MM to CT Round Cut Size Comparison Tool
Brilliant Round Cut Diamond Carat MM
0.21 – 5.20 cts
| ROUND CUT CARAT WEIGHT | ROUND CUT MM SIZE |
|---|---|
| 0.21 – 0.22 ct | 3.80 – 3.90 mm |
| 0.23 – 0.24 ct | 3.90 – 4.00 mm |
| 0.25 – 0.26 ct | 4.00 – 4.10 mm |
| 0.26 – 0.27 ct | 4.10 – 4.20 mm |
| 0.27 – 0.28 ct | 4.20 – 4.30 mm |
| 0.30 – 0.36 ct | 4.40 – 4.50 mm |
| 0.40 – 0.45 ct | 4.60 – 4.70 mm |
| 0.46 – 0.48 ct | 4.90 – 5.00 mm |
| 0.50 – 0.57 ct | 5.10 – 5.30 mm |
| 0.60 – 0.67 ct | 5.40 – 5.60 mm |
| 0.70 – 0.77 ct | 5.70 – 5.90 mm |
| 0.80 – 0.85 ct | 6.00 – 6.10 mm |
| 0.90 – 0.95 ct | 6.20 – 6.30 mm |
| 1.00 – 1.10 ct | 6.40 – 6.60 mm |
| 1.22 – 1.26 ct | 6.70 – 6.80 mm |
| 1.28 – 1.30 ct | 6.90 – 7.10 mm |
| 1.50 – 1.55 ct | 7.20 – 7.40 mm |
| 1.67 – 1.80 ct | 7.50 – 7.90 mm |
| 2.00 – 2.10 ct | 8.10 – 8.30 mm |
| 2.40 – 2.60 ct | 8.50 – 8.80 mm |
| 2.70 – 2.80 ct | 8.90 – 9.10 mm |
| 3.00 – 3.10 ct | 9.20 – 9.40 mm |
| 3.30 – 3.40 ct | 9.50 – 9.60 mm |
| 3.50 – 3.70 ct | 9.70 – 9.80 mm |
| 3.80 – 3.90 ct | 9.90 – 10.00 mm |
| 4.00 – 4.10 ct | 10.10 – 10.20 mm |
| 4.30 – 4.40 ct | 10.30 – 10.50 mm |
| 4.50 – 4.60 ct | 10.60 – 10.70 mm |
| 4.70 – 4.80 ct | 10.80 – 10.90 mm |
| 4.90 – 4.99 ct | 10.90 – 11.00 mm |
| 5.00 – 5.20 ct | 11.10 – 11.20 mm |
Round Cut Melee Diamond Conversion of CT MM / MM to Carat And Sieve Size Chart
0.005 – 0.20 cts
| ROUND CUT CARAT WEIGHT | ROUND CUT MM SIZE | CTS/PCS | ROUND CUT SIEVE SIZES |
|---|---|---|---|
| 0.005 ct | 0.90-1.10 mm | 1/200 | +000/-0 |
| 0.006 ct | 1.10-1.15 mm | 1/175 | +0/-1 |
| 0.007 ct | 1.15-1.20 mm | 1/150 | +1/-1.5 |
| 0.008 ct | 1.20-1.25 mm | 1/120 | +1.5/-2 |
| 0.009 ct | 1.25-1.30 mm | 1/100 | +2/-2.5 |
| 0.010 ct | 1.30-1.35 mm | 1/100 | +2.5/-3 |
| 0.011 ct | 1.35-1.40 mm | 1/100 | +3/-3.5 |
| 0.012 ct | 1.40-1.45 mm | 1/80 | +3.5/-4 |
| 0.013 ct | 1.45-1.50 mm | 1/80 | +4/-4.5 |
| 0.014 ct | 1.50-1.55 mm | 1/70 | +4.5/-5 |
| 0.016 ct | 1.55-1.60 mm | 1/60 | +5/-5.5 |
| 0.018 ct | 1.60-1.70 mm | 1/50 | +5.5/-6 |
| 0.021 ct | 1.70-1.80 mm | 1/50 | +6/-6.5 |
| 0.025 ct | 1.80-1.90 mm | 1/40 | +6.5/-7 |
| 0.029 ct | 1.90-2.00 mm | 1/30 | +7/-7.5 |
| 0.035 ct | 2.00-2.10 mm | 1/30 | +7.5/-8 |
| 0.039 ct | 2.10-2.20 mm | 1/25 | +8/-8.5 |
| 0.044 ct | 2.20-2.30 mm | 1/25 | +8.5/-9 |
| 0.052 ct | 2.30-2.40 mm | 1/20 | +9/-9.5 |
| 0.058 ct | 2.40-2.50 mm | 1/20 | +9.5/-10 |
| 0.069 ct | 2.50-2.60 mm | 1/15 | +10/-10.5 |
| 0.074 ct | 2.60-2.70 mm | 1/15 | +10.5/-11 |
| 0.078 ct | 2.70-2.80 mm | 1/12 | +11/-11.5 |
| 0.086 ct | 2.80-2.90 mm | 1/12 | +11.5/-12 |
| 0.095 ct | 2.90-3.00 mm | 1/10 | +12/-12.5 |
| 0.108 ct | 3.00-3.10 mm | 1/10 | +12.5/-13 |
| 0.116 ct | 3.10-3.20 mm | 1/8 | +13/-13.5 |
| 0.13 ct | 3.20-3.30 mm | 1/8 | +13.5/-14 |
| 0.145 ct | 3.30-3.40 mm | 1/6 | +14/-14.5 |
| 0.155 ct | 3.40-3.50 mm | 1/6 | +14.5/-15 |
| 0.165 ct | 3.50-3.60 mm | 1/6 | +15/-15.5 |
| 0.19 ct | 3.60-3.70 mm | 1/5 | +15.5/-15.75 |
| 0.20 ct | 3.70-3.80 mm | 1/5 | +15.75/-16.5 |
What is the Ideal Table and Depth for the Brilliant Round Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 53% – 58% | 52% – 53% or 58% – 60% | 51% or 61% – 64% |
| Depth – % | 59% – 62.3% | 58% – 58.9% or 62.4% – 63.5% | 57.5% – 57.9% or 63.6% – 64.1% |
| Crown Angle | 34 – 34.9 | 32.1 – 33.9 or 35 – 35.9 | 30.1 – 32 or 36 – 37.9 |
| Pavilion Depth – % | 42.8% – 43.2% | 42% – 42.7% or 43.3% – 43.9% | 41% – 41.9% or 44% – 45.5% |
| Girdle | Thin to Sl. Thick | Very Thin to Sl. Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT / VERY GOOD | GOOD | |
|---|---|---|
| Length To Width Ratio | 0.99 – 1.01 | 0.98 – 1.01 |
Professional Princess Diamond Size Chart
Detailed Carat to MM / MM to Carat Princess Cut Diamond Size Chart
Princess Cut Diamond MM Size Chart / CT Conversion Chart
| PRINCESS CARAT WEIGHT | PRINCESS CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.11 ct. | 2.50 – 2.60 mm. |
| 0.12 – 0.13 ct. | 2.70 – 2.80 mm. |
| 0.14 – 0.17 ct. | 2.90 – 3.00 mm. |
| 0.18 – 0.21 ct. | 3.10 – 3.20 mm. |
| 0.22 – 0.24 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.28 ct. | 3.50 – 3.60 mm. |
| 0.30 – 0.35 ct. | 3.70 – 3.80 mm. |
| 0.35 – 0.40 ct. | 3.90 – 4.00 mm. |
| 0.40 – 0.45 ct. | 4.10 – 4.20 mm. |
| 0.45 – 0.50 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.00 mm. |
| PRINCESS CARAT WEIGHT | PRINCESS CUT MM SIZE |
|---|---|
| 0.80 – 0.89 ct. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.30 – 5.50 mm. |
| 1.00 – 1.15 ct. | 5.40 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.40 – 5.90 mm. |
| 1.30 – 1.45 ct. | 5.80 – 6.40 mm. |
| 1.50 – 1.60 ct. | 6.00 – 6.70 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.80 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.20 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.10 mm. |
| 3.00 – 3.30 ct. | 7.70 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.20 – 8.60 mm. |
| 3.70 – 3.90 ct. | 8.30 – 8.70 mm. |
| 4.00 – 4.20 ct. | 8.40 – 9.10 mm. |
| 4.40 – 4.70 ct. | 9.00 – 9.60 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Princess Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 67% – 72% | 59% – 66% or 73% – 75% | 59% – 66% or 73% – 75% |
| Depth – % | 64% | 75% | 58% or 75.1% – 80% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT / VERY GOOD | GOOD | |
|---|---|---|
| Length To Width Ratio | 1.00 – 1.03 | 1.04 – 1.05 |
Professional Square Cushion Cut Diamond Size Chart
Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool
Cushion Cut MM to Carat Diamond Conversion Charts for 0.04 – 0.69 cts
| CUSHION CARAT WEIGHT | CUSHION CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.11 ct. | 2.50 – 2.60 mm. |
| 0.12 – 0.13 ct. | 2.70 – 2.80 mm. |
| 0.14 – 0.17 ct. | 2.90 – 3.00 mm. |
| 0.18 – 0.21 ct. | 3.10 – 3.20 mm. |
| 0.22 – 0.24 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.28 ct. | 3.50 – 3.60 mm. |
| 0.30 – 0.35 ct. | 3.70 – 3.80 mm. |
| 0.35 – 0.40 ct. | 3.90 – 4.00 mm. |
| 0.40 – 0.45 ct. | 4.10 – 4.20 mm. |
| 0.45 – 0.50 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.00 mm. |
Cushion Cut MM to Carat Diamond Conversion Charts for 0.70 – 5.25 cts
| CUSHION CARAT WEIGHT | CUSHION CUT MM SIZE |
|---|---|
| 0.80 – 0.89 ct. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.30 – 5.50 mm. |
| 1.00 – 1.15 ct. | 5.40 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.40 – 5.90 mm. |
| 1.30 – 1.45 ct. | 5.80 – 6.40 mm. |
| 1.50 – 1.60 ct. | 6.00 – 6.70 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.80 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.20 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.10 mm. |
| 3.00 – 3.30 ct. | 7.70 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.20 – 8.60 mm. |
| 3.70 – 3.90 ct. | 8.30 – 8.70 mm. |
| 4.00 – 4.20 ct. | 8.40 – 9.10 mm. |
| 4.40 – 4.70 ct. | 9.00 – 9.60 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Princess Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 67% – 72% | 59% – 66% or 73% – 75% | 59% – 66% or 73% – 75% |
| Depth – % | 64% | 75% | 58% or 75.1% – 80% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT / VERY GOOD | GOOD | |
|---|---|---|
| Length To Width Ratio | 1.00 – 1.03 | 1.04 – 1.05 |
Rectangular Cushion Cut Diamond Size Chart
CT to MM / MM to CT Rectangular Cushion Cut Diamond Size Chart
Professional Rectangular Cushion Cut MM to CT Conversion Tool for 0.08 – 0.89 cts
| RECTANGULAR CUSHION CARAT WEIGHT | RECTANGULAR CUSHION MM LENGTH | RECTANGULAR CUSHION MM WIDTH |
|---|---|---|
| 0.08 – 0.11 ct. | 2.90 – 3.10 mm. | 2.30 – 2.40 mm. |
| 0.10 – 0.13 ct. | 3.20 – 3.40 mm. | 2.40 – 2.50 mm. |
| 0.12 – 0.15 ct. | 3.30 – 3.50 mm. | 2.40 – 2.60 mm. |
| 0.13 – 0.16 ct. | 3.50 – 3.60 mm. | 2.60 – 2.80 mm. |
| 0.16 – 0.19 ct. | 3.70 – 3.80 mm. | 2.90 – 3.10 mm. |
| 0.17 – 0.20 ct. | 3.90 – 4.00 mm. | 2.90 – 3.10 mm. |
| 0.21 – 0.22 ct. | 4.10 – 4.20 mm. | 3.10 – 3.20 mm. |
| 0.23 – 0.27 ct. | 4.30 – 4.40 mm. | 3.20 – 3.30 mm. |
| 0.28 – 0.36 ct. | 4.40 – 4.50 mm. | 3.30 – 3.50 mm. |
| 0.36 – 0.42 ct. | 4.70 – 4.80 mm. | 3.40 – 3.80 mm. |
| 0.43 – 0.48 ct. | 4.90 – 5.00 mm. | 3.60 – 3.90 mm. |
| 0.49 – 0.52 ct. | 5.00 – 5.20 mm. | 4.00 – 4.20 mm. |
| 0.52 – 0.55 ct. | 5.20 – 5.40 mm. | 4.00 – 4.20 mm. |
| 0.60 – 0.67 ct. | 5.40 – 5.60 mm. | 4.30 – 4.50 mm. |
| 0.70 – 0.75 ct. | 5.60 – 5.70 mm. | 4.50 – 4.60 mm. |
| 1.00 – 1.15 ct. | 6.50 – 6.80 mm. | 4.90 – 5.10 mm. |
| 1.20 – 1.27 ct. | 6.80 – 7.30 mm. | 5.40 – 5.70 mm. |
Professional Rectangular Cushion Cut MM to CT Conversion Tool for 0.90 – 5.25 cts
| RECTANGULAR CUSHION CARAT WEIGHT | RECTANGULAR CUSHION MM LENGTH | RECTANGULAR CUSHION MM WIDTH |
|---|---|---|
| 0.90 – 0.98 ct. | 6.10 – 6.40 mm. | 4.70 – 4.90 mm. |
| 1.00 – 1.15 ct. | 6.50 – 6.80 mm. | 4.90 – 5.10 mm. |
| 1.20 – 1.27 ct. | 6.80 – 7.30 mm. | 5.40 – 5.70 mm. |
| 1.30 – 1.45 ct. | 7.00 – 7.40 mm. | 5.80 – 5.90 mm. |
| 1.50 – 1.60 ct. | 7.30 – 7.90 mm. | 5.80 – 6.20 mm. |
| 1.65 – 1.80 ct. | 7.50 – 8.10 mm. | 6.10 – 6.50 mm. |
| 2.00 – 2.30 ct. | 8.00 – 8.60 mm. | 6.40 – 6.80 mm. |
| 2.40 – 2.60 ct. | 8.50 – 9.00 mm. | 6.90 – 7.20 mm. |
| 2.70 – 2.90 ct. | 8.90 – 9.40 mm. | 7.10 – 7.30 mm. |
| 3.00 – 3.30 ct. | 9.20 – 9.80 mm. | 7.30 – 7.70 mm. |
| 3.40 – 3.60 ct. | 9.40 – 10.00 mm. | 7.60 – 7.90 mm. |
| 3.70 – 3.90 ct. | 9.90 – 11.00 mm. | 8.00 – 8.40 mm. |
| 4.00 – 4.20 ct. | 10.00 – 11.00 mm. | 8.10 – 8.50 mm. |
| 4.40 – 4.70 ct. | 10.70 – 11.50 mm. | 8.40 – 8.70 mm. |
| 5.00 – 5.25 ct. | 11.00 – 11.70 mm. | 8.70 – 9.10 mm. |
| 0.90 – 0.98 ct. | 6.10 – 6.40 mm. | 4.70 – 4.90 mm. |
What is the Recommended Diamond Depth and Table for the Rectangular Cushion Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% | 54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 59.9% or 70.1% – 74% | 54% – 56.9% or 74.1% – 78% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.20-1.30 | 1.15 – 1.25 or 1.29 – 1.35 | 1.10 – 1.15 or 1.36 – 1.40 |
Professional Oval Diamond Size Chart
Detailed Oval Cut Size Comparison From CT to MM / MM to CT by Gemologists
Oval Cut Diamond Conversion Tool From CT to MM / MM to CT for 0.04 – 1.15 cts.
| OVAL CUT CARAT WEIGHT | OVAL CUT LENGTH MM SIZE | OVAL CUT WIDTH MM SIZE |
|---|---|---|
| 0.04 – 0.07 ct | 2.50 – 3.40 mm. | 2.00 – 2.40 mm. |
| 0.08 – 0.12 ct | 3.40 – 4.80 mm. | 2.40 – 3.00 mm. |
| 0.13 – 0.17 ct | 3.90 – 4.40 mm. | 2.80 – 3.10 mm. |
| 0.18 – 0.22 ct | 4.10 – 4.60 mm. | 3.00 – 3.40 mm. |
| 0.23 – 0.28 ct | 4.50 – 5.10 mm. | 3.30 – 3.60 mm. |
| 0.30 – 0.37 ct | 4.90 – 5.60 mm. | 3.60 – 4.00 mm. |
| 0.40 – 0.48 ct | 5.60 – 6.00 mm. | 4.00 – 4.40 mm. |
| 0.50 – 0.58 ct | 5.90 – 6.30 mm. | 4.40 – 4.60 mm. |
| 0.60 – 0.69 ct | 6.30 – 6.70 mm. | 4.60 – 4.80 mm. |
| 0.70 – 0.78 ct | 6.60 – 6.80 mm. | 4.80 – 5.20 mm. |
| 0.80 – 0.88 ct | 6.90 – 7.30 mm. | 5.10 – 5.40 mm. |
| 0.90 – 0.98 ct | 7.20 – 7.80 mm. | 5.20 – 5.50 mm. |
| 1.00 – 1.15 ct | 7.90 – 8.20 mm. | 5.50 – 5.80 mm. |
Oval Cut Diamond Conversion Tool From CT to MM / MM to CT for 1.20 to 1.15
| OVAL CUT CARAT WEIGHT | OVAL CUT LENGTH MM SIZE | OVAL CUT WIDTH MM SIZE |
|---|---|---|
| 1.20 – 1.27 ct | 8.10 – 8.30 mm. | 6.00 – 6.10 mm. |
| 1.30 – 1.45 ct | 8.40 – 8.50 mm. | 6.00 – 6.20 mm. |
| 1.50 – 1.60 ct | 8.50 – 8.80 mm. | 6.20 – 6.40 mm. |
| 1.65 – 1.80 ct | 8.90 – 9.60 mm. | 6.60 – 6.80 mm. |
| 2.00 – 2.30 ct | 9.80 – 10.10 mm. | 7.10 – 7.30 mm. |
| 2.40 – 2.60 ct | 10.30 – 10.70 mm. | 7.50 – 7.80 mm. |
| 2.70 – 2.90 ct | 10.70 – 11.00 mm. | 7.80 – 7.90 mm. |
| 3.00 – 3.30 ct | 10.90 – 11.60 mm. | 8.00 – 8.40 mm. |
| 3.40 – 3.60 ct | 11.50 – 12.00 mm. | 8.40 – 8.70 mm. |
| 3.70 – 3.90 ct | 12.00 – 12.35 mm. | 8.80 – 8.90 mm. |
| 4.00 – 4.20 ct | 12.25 – 12.50 mm. | 8.80 – 9.00 mm. |
| 4.40 – 4.70 ct | 12.40 – 13.00 mm. | 9.00 – 9.30 mm. |
| 5.00 – 5.25 ct | 13.00 – 13.60 mm. | 9.40 – 9.70 mm. |
What is the Ideal Diamond Depth and Table for the Oval Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 67% – 72% | 59% – 66% or 73% – 75% |
59% – 66% or 73% – 75% |
| Depth – % | 64% | 75% | 58% – 63.9% or 75.1% – 80% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 – 1.03 | 1.30 – 1.34 or 1.51 – 1.55 | 1.25 – 1.29 or 1.56 – 1.60 |
Professional Pear Shape Diamond Size Chart & Conversion Tool
Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT for 0.4 – 1.15 cts
| PEAR SHAPE CARAT WEIGHT | LENGTH MM SIZE | WIDTH MM SIZE |
|---|---|---|
| 0.04 – 0.07 ct. | 3.30 – 3.70 mm. | 2.00 – 2.40 mm. |
| 0.08 – 0.12 ct. | 3.60 – 4.20 mm. | 2.40 – 2.80 mm. |
| 0.13 – 0.17 ct. | 4.10 – 4.80 mm. | 2.90 – 3.20 mm. |
| 0.18 – 0.22 ct. | 4.70 – 5.20 mm. | 3.10 – 3.30 mm. |
| 0.23 – 0.28 ct. | 5.10 – 5.80 mm. | 3.40 – 3.70 mm. |
| 0.30 – 0.37 ct. | 5.70 – 6.10 mm. | 3.60 – 4.00 mm. |
| 0.40 – 0.48 ct. | 6.10 – 6.60 mm. | 3.90 – 4.40 mm. |
| 0.50 – 0.59 ct. | 6.50 – 7.30 mm. | 4.30 – 4.60 mm. |
| 0.60 – 0.67 ct. | 6.80 – 7.40 mm. | 4.60 – 4.80 mm. |
| 0.70 – 0.78 ct. | 7.30 – 8.00 mm. | 4.80 – 5.00 mm. |
| 0.80 – 0.88 ct. | 8.00 – 8.40 mm. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 8.20 – 8.50 mm. | 5.30 – 5.50 mm. |
| 1.00 – 1.15 ct. | 8.40 – 8.90 mm. | 5.60 – 5.80 mm. |
Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT for 1.20 to 1.15
| PEAR SHAPE CARAT WEIGHT | LENGTH MM SIZE | WIDTH MM SIZE |
|---|---|---|
| 1.20 – 1.27 ct | 9.00 – 9.50 mm. | 5.90 – 6.00 mm. |
| 1.30 – 1.45 ct | 9.30 – 9.60 mm. | 6.10 – 6.20 mm. |
| 1.50 – 1.60 ct | 9.70 – 10.20 mm. | 6.30 – 6.50 mm. |
| 1.65 – 1.80 ct | 10.00 – 10.50 mm. | 6.50 – 6.70 mm. |
| 2.00 – 2.30 ct | 10.70 – 11.50 mm. | 7.00 – 7.30 mm. |
| 2.40 – 2.60 ct | 11.50 – 11.80 mm. | 7.40 – 7.70 mm. |
| 2.70 – 2.90 ct | 11.70 – 12.30 mm. | 7.70 – 7.80 mm. |
| 3.00 – 3.30 ct | 12.40 – 13.00 mm. | 8.00 – 8.20 mm. |
| 3.40 – 3.60 ct | 12.70 – 13.40 mm. | 8.30 – 8.50 mm. |
| 3.70 – 3.90 ct | 13.30 – 13.70 mm. | 8.50 – 8.70 mm. |
| 4.00 – 4.20 ct | 13.60 – 14.00 mm. | 8.70 – 8.90 mm. |
| 4.40 – 4.70 ct | 14.00 – 14.30 mm. | 9.00 – 9.20 mm. |
| 5.00 – 5.25 ct | 14.50 – 15.50 mm. | 9.30 – 9.70 mm. |
What is the Ideal Diamond Depth and Table for the Pear Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 53% – 63% | 52% – 64% or 64% – 65% | 51% or 66% – 68% |
| Depth – % | 58% – 62% | 56% – 57.9% or 62.1% – 66% | 53% – 55.9% or 66.1% – 71% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Pear Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.45 – 1.55 | 1.40 – 1.45 or 1.56 – 1.65 | 1.35 – 1.39 or 1.66 – 1.80 |
Professional Emerald Cut Diamond Size Chart
Emerald Shaped Diamond Size Comparison From CT to MM / MM to CT
Emerald Cut Diamond Conversion Charts From CT to MM / MM to CT for 0.08 – 0.74 cts.
| EMERALD CUT CARAT WEIGHT | EMERALD CUT LENGTH MM SIZE | EMERALD CUT WIDTH MM SIZE |
|---|---|---|
| 0.08 – 0.11 ct. | 2.90 – 3.20 mm. | 2.10 – 2.30 mm. |
| 0.12 – 0.14 ct. | 3.20 – 3.40 mm. | 2.30 – 2.50 mm. |
| 0.13 – 0.15 ct. | 3.30 – 3.50 mm. | 2.30 – 2.70 mm. |
| 0.14 – 0.16 ct. | 3.50 – 3.60 mm. | 2.60 – 2.80 mm. |
| 0.16 – 0.17 ct. | 3.70 – 3.80 mm. | 2.70 – 2.80 mm. |
| 0.18 – 0.21 ct. | 3.90 – 4.00 mm. | 2.70 – 2.90 mm. |
| 0.22 – 0.24 ct. | 4.10 – 4.20 mm. | 2.90 – 3.10 mm. |
| 0.25 – 0.28 ct. | 4.30 – 4.40 mm. | 3.10 – 3.30 mm. |
| 0.30 – 0.34 ct. | 4.50 – 4.60 mm. | 3.20 – 3.40 mm. |
| 0.35 – 0.38 ct. | 4.70 – 4.80 mm. | 3.40 – 3.50 mm. |
| 0.40 – 0.44 ct. | 4.90 – 5.00 mm. | 3.50 – 3.60 mm. |
| 0.45 – 0.48 ct. | 5.00 – 5.20 mm. | 3.60 – 3.80 mm. |
| 0.50 – 0.53 ct. | 5.20 – 5.50 mm. | 3.80 – 4.00 mm. |
| 0.54 – 0.57 ct. | 5.50 – 5.70 mm. | 4.00 – 4.20 mm. |
| 0.60 – 0.68 ct. | 5.70 – 5.80 mm. | 4.00 – 4.30 mm. |
| 1.20 – 1.27 ct. | 7.00 – 7.40 mm. | 5.10 – 5.30 mm. |
| 1.30 – 1.45 ct. | 7.20 – 7.60 mm. | 5.20 – 5.50 mm. |
| EMERALD CUT CARAT WEIGHT | EMERALD CUT LENGTH MM SIZE | EMERALD CUT WIDTH MM SIZE |
|---|---|---|
| 0.74 – 0.78 ct. | 6.10 – 6.20 mm. | 4.40 – 4.50 mm. |
| 0.80 – 0.88 ct. | 6.30 – 6.50 mm. | 4.40 – 4.70 mm. |
| 0.90 – 0.98 ct. | 6.50 – 6.70 mm. | 4.60 – 4.90 mm. |
| 1.00 – 1.15 ct. | 6.80 – 7.00 mm. | 4.80 – 5.20 mm. |
| 1.20 – 1.27 ct. | 7.00 – 7.40 mm. | 5.10 – 5.30 mm. |
| 1.30 – 1.45 ct. | 7.20 – 7.60 mm. | 5.20 – 5.50 mm. |
| 1.50 – 1.60 ct. | 7.50 – 7.80 mm. | 5.40 – 5.60 mm. |
| 1.65 – 1.80 ct. | 7.70 – 8.20 mm. | 5.60 – 5.80 mm. |
| 2.00 – 2.30 ct. | 8.10 – 8.80 mm. | 6.00 – 6.40 mm. |
| 2.40 – 2.60 ct. | 8.80 – 9.40 mm. | 6.40 – 6.70 mm. |
| 2.70 – 2.90 ct. | 9.10 – 9.60 mm. | 6.60 – 6.80 mm. |
| 3.00 – 3.30 ct. | 9.40 – 10.00 mm. | 6.70 – 7.30 mm. |
| 3.40 – 3.60 ct. | 9.70 – 10.40 mm. | 7.20 – 7.40 mm. |
| 3.70 – 3.90 ct. | 9.90 – 10.80 mm. | 7.30 – 7.50 mm. |
| 4.00 – 4.20 ct. | 10.30 – 10.80 mm. | 7.50 – 7.90 mm. |
| 4.40 – 4.70 ct. | 10.80 – 11.20 mm. | 7.90 – 8.10 mm. |
| 5.00 – 5.25 ct. | 11.20 – 11.80 mm. | 8.10 – 8.30 mm. |
What is the Ideal Diamond Depth and Table for the Emerald Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 61% or 68% – 72% | 59% – 66% or 73% – 75% |
| Depth – % | 60% – 67% | 58% – 61% or 67% – 70% | 54% – 57% or 73% – 74% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.35 – 1.50 | 1.30 – 1.40 or 1.50 – 1.60 | 1.25 – 1.26 or 1.59 – 1.70 |
Professional Asscher Cut Diamond Size Chart
Asscher Shaped Diamond Size Comparison From CT to MM and Vice Versa
Asscher Cut Diamond CT to MM / MM to CT Conversion Chart for 0.04 – 0.75 cts
| ASSCHER CUT CARAT WEIGHT | ASSCHER CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.11 ct. | 2.50 – 2.60 mm. |
| 0.12 – 0.13 ct. | 2.70 – 2.80 mm. |
| 0.14 – 0.17 ct. | 2.90 – 3.10 mm. |
| 0.18 – 0.21 ct. | 3.20 – 3.30 mm. |
| 0.22 – 0.24 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.28 ct. | 3.50 – 3.70 mm. |
| 0.30 – 0.35 ct. | 3.70 – 3.90 mm. |
| 0.35 – 0.40 ct. | 3.90 – 4.00 mm. |
| 0.40 – 0.45 ct. | 4.10 – 4.20 mm. |
| 0.45 – 0.50 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.20 mm. |
Asscher Cut Diamond CT to MM / MM to CT Conversion Chart for 0.80 – 5.25 cts
| ASSCHER CUT CARAT WEIGHT | ASSCHER CUT MM SIZE |
|---|---|
| 0.80 – 0.89 ct. | 5.20 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.30 – 5.40 mm. |
| 1.00 – 1.15 ct. | 5.50 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.70 – 6.20 mm. |
| 1.30 – 1.45 ct. | 6.10 – 6.50 mm. |
| 1.50 – 1.60 ct. | 6.20 – 6.60 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.90 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.40 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.20 mm. |
| 3.00 – 3.30 ct. | 7.80 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.30 – 8.70 mm. |
| 3.70 – 3.90 ct. | 8.50 – 8.90 mm. |
| 4.00 – 4.20 ct. | 8.70 – 9.20 mm. |
| 4.40 – 4.70 ct. | 9.10 – 9.70 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Asscher Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% | 54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 60.9% or 67.1% – 70% | 54% – 56.9% or 74.1% – 78% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the recommended Length to Width Ratio of an Asscher Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 | 1.03 | 1.04 – 1.05 |
Professional Square Radiant Cut Diamond Size Chart
Square Radiant Shaped Diamond Size Comparison Tool
Radiant Cut Diamond CT to MM / MM to CT Conversion Chart for 0.04 – 0.77 cts
| ROUND CUT CARAT WEIGHT | ROUND CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.10 ct. | 2.50 – 2.60 mm. |
| 0.10 – 0.12 ct. | 2.70 – 2.80 mm. |
| 0.13 – 0.15 ct. | 2.90 – 3.00 mm. |
| 0.16 – 0.18 ct. | 3.10 – 3.20 mm. |
| 0.20 – 0.22 ct. | 3.20 – 3.40 mm. |
| 0.23 – 0.26 ct. | 3.50 – 3.60 mm. |
| 0.28 – 0.31 ct. | 3.70 – 3.80 mm. |
| 0.32 – 0.35 ct. | 3.90 – 4.00 mm. |
| 0.38 – 0.40 ct. | 4.10 – 4.20 mm. |
| 0.43 – 0.47 ct. | 4.30 – 4.40 mm. |
| 0.50 – 0.55 ct. | 4.50 – 4.60 mm. |
| 0.55 – 0.58 ct. | 4.70 – 4.80 mm. |
| 0.60 – 0.68 ct. | 4.90 – 5.00 mm. |
| 0.70 – 0.77 ct. | 5.00 – 5.20 mm. |
| 0.80 – 5.25 cts | 6.00 – 11.20 mm |
Radiant Cut Diamond CT to MM / MM to CT Conversion Chart for0.80 – 5.25 cts
| SQUARE RADIANT CUT CARAT WEIGHT | SQUARE RADIANT CUT MM SIZE |
|---|---|
| 0.80 – 0.88 ct. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.20 – 5.40 mm. |
| 1.00 – 1.15 ct. | 5.50 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.70 – 6.20 mm. |
| 1.30 – 1.45 ct. | 6.10 – 6.50 mm. |
| 1.50 – 1.60 ct. | 6.20 – 6.60 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.90 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.40 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.20 mm. |
| 3.00 – 3.30 ct. | 7.80 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.30 – 8.70 mm. |
| 3.70 – 3.90 ct. | 8.50 – 8.90 mm. |
| 4.00 – 4.20 ct. | 8.70 – 9.20 mm. |
| 4.40 – 4.70 ct. | 9.10 – 9.70 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Radiant Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% |
54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 60.9% or 67.1% – 70% |
57% – 58.9% or 70.1% – 74% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Length to Width Ratio of a Radiant Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 | 1.03 | 1.04 – 1.05 |
Professional Rectangular Radiant Cut Diamond Size Chart
Realistic Rectangular Radiant Shaped Diamond Size Comparison from CT TO MM / MM to CT
Rectangular Radiant Cut Diamond CT to MM / MM to CT for 0.09 – 0.98 cts
| RECTANGULAR RADIANT CUT CARAT WEIGHT | RECTANGULAR RADIANT CUT LENGTH MM SIZE | RECTANGULAR RADIANT CUT WIDTH MM SIZE |
|---|---|---|
| 0.09 – 0.11 ct. | 2.90 – 3.10 mm. | 2.30 – 2.40 mm. |
| 0.11 – 0.13 ct. | 3.20 – 3.40 mm. | 2.40 – 2.50 mm. |
| 0.13 – 0.15 ct. | 3.30 – 3.50 mm. | 2.40 – 2.60 mm. |
| 0.14 – 0.16 ct. | 3.50 – 3.60 mm. | 2.60 – 2.80 mm. |
| 0.18 – 0.20 ct. | 3.70 – 3.80 mm. | 2.90 – 3.10 mm. |
| 0.19 – 0.22 ct. | 3.90 – 4.00 mm. | 2.90 – 3.10 mm. |
| 0.23 – 0.24 ct. | 4.10 – 4.20 mm. | 3.10 – 3.20 mm. |
| 0.25 – 0.28 ct. | 4.30 – 4.40 mm. | 3.20 – 3.30 mm. |
| 0.30 – 0.36 ct. | 4.40 – 4.50 mm. | 3.30 – 3.50 mm. |
| 0.38 – 0.44 ct. | 4.70 – 4.80 mm. | 3.40 – 3.80 mm. |
| 0.43 – 0.48 ct. | 4.90 – 5.00 mm. | 3.60 – 3.90 mm. |
| 0.49 – 0.52 ct. | 5.00 – 5.20 mm. | 4.00 – 4.20 mm. |
| 0.52 – 0.55 ct. | 5.20 – 5.40 mm. | 4.00 – 4.20 mm. |
| 0.60 – 0.67 ct. | 5.40 – 5.60 mm. | 4.30 – 4.50 mm. |
| 0.70 – 0.75 ct. | 5.60 – 5.70 mm. | 4.50 – 4.60 mm. |
| 0.80 – 0.89 ct. | 5.70 – 6.00 mm. | 4.50 – 4.60 mm. |
| 0.90 – 0.98 ct. | 6.10 – 6.40 mm. | 4.70 – 4.90 mm. |
Rectangular Radiant Cut Diamond CT to MM / MM to CT for 0.09 – 0.98 cts
| RECTANGULAR RADIANT CUT CARAT WEIGHT | RECTANGULAR RADIANT CUT LENGTH MM SIZE | RECTANGULAR RADIANT CUT WIDTH MM SIZE |
|---|---|---|
| 1.00 – 1.15 ct | 6.50 – 6.80 mm. | 4.90 – 5.10 mm. |
| 1.20 – 1.27 ct | 6.80 – 7.30 mm. | 5.40 – 5.70 mm. |
| 1.30 – 1.45 ct | 7.00 – 7.40 mm. | 5.80 – 5.90 mm. |
| 1.50 – 1.60 ct | 7.30 – 7.90 mm. | 5.80 – 6.20 mm. |
| 1.65 – 1.80 ct | 7.50 – 8.10 mm. | 6.10 – 6.50 mm. |
| 2.00 – 2.30 ct | 8.00 – 8.60 mm. | 6.40 – 6.80 mm. |
| 2.40 – 2.60 ct | 8.50 – 9.00 mm. | 6.90 – 7.20 mm. |
| 2.70 – 2.90 ct | 8.90 – 9.40 mm. | 7.10 – 7.30 mm. |
| 3.00 – 3.30 ct | 9.20 – 9.80 mm. | 7.30 – 7.70 mm. |
| 3.40 – 3.60 ct | 9.40 – 10.00 mm. | 7.60 – 7.90 mm. |
| 3.70 – 3.90 ct | 9.90 – 11.00 mm. | 8.00 – 8.40 mm. |
| 4.00 – 4.20 ct | 10.00 – 11.00 mm. | 8.10 – 8.50 mm. |
| 4.40 – 4.70 ct | 10.70 – 11.50 mm. | 8.40 – 8.70 mm. |
| 5.00 – 5.25 ct | 11.00 – 11.70 mm. | 8.70 – 9.10 mm. |
What is the Ideal Diamond Depth and Table for the Rectangular Radiant Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% | 54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 59.9% or 70.1% – 74% | 54% – 56.9% or 74.1% – 78% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
Recommended Length to Width Ratio of Rectangular Radiant Shaped Diamonds?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.20-1.30 | 1.15 – 1.25 or 1.29 – 1.35 | 1.10 – 1.15 or 1.36 – 1.40 |
Professional Heart Diamond Size Chart & Conversion Tool
MM to CT / CT to MM Heart Shaped Diamond Size Comparison
How to Accurately Measure a Heart Shaped Diamond
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts for 0.18-5.20 cts (Excellent Cut)
| HEART SHAPE CARAT WEIGHT | HEART SHAPE MM SIZE (RATIO OF 0.95 – 1.02) EXCELLENT CUT |
|---|---|
| 0.18 – 0.21 ct. | 3.50 – 3.70 mm. |
| 0.23 – 0.26 ct. | 3.80 – 4.10 mm. |
| 0.27 – 0.29 ct. | 4.20 – 4.40 mm. |
| 0.30 – 0.38 ct. | 4.50 – 4.70 mm. |
| 0.40 – 0.45 ct. | 4.90 – 5.10 mm. |
| 0.50 – 0.57 ct. | 5.20 – 5.50 mm. |
| 0.60 – 0.65 ct. | 5.60 – 5.70 mm. |
| 0.70 – 0.75 ct. | 5.80 – 6.10 mm. |
| 0.80 – 0.85 ct. | 6.10 – 6.30 mm. |
| 0.90 – 0.95 ct. | 6.20 – 6.50 mm. |
| 1.00 – 1.10 ct. | 6.40 – 6.70 mm. |
| 1.20 – 1.30 ct. | 7.00 – 7.40 mm. |
| 1.50 – 1.60 ct. | 7.50 – 7.90 mm. |
| 1.70 – 1.80 ct. | 8.00 – 8.20 mm. |
| 2.00 – 2.20 ct. | 8.30 – 8.60 mm. |
| 2.40 – 2.60 ct. | 8.40 – 8.90 mm. |
| 2.70 – 2.85 ct. | 8.80 – 9.30 mm. |
| 3.00 – 3.20 ct. | 9.30 – 9.80 mm. |
| 3.40 – 3.60 ct. | 9.50 – 9.90 mm. |
| 4.00 – 4.20 ct. | 9.80 – 10.00 mm. |
| 4.40 – 4.60 ct. | 9.90 – 10.30 mm. |
| 5.00 – 5.20 ct. | 10.50 – 11.10 mm. |
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts for 0.17 – 2.20 cts (Good Cut)
| HEART SHAPE CARAT WEIGHT | HEART SHAPE MM SIZE (RATIO OF 0.90 – 1.05) VERY GOOD CUT |
|---|---|
| 0.17 – 0.21 ct. | 3.30 – 3.70 mm. |
| 0.23 – 0.26 ct. | 3.60 – 3.90 mm. |
| 0.27 – 0.29 ct. | 4.00 – 4.30 mm. |
| 0.30 – 0.38 ct. | 4.20 – 4.60 mm. |
| 0.40 – 0.45 ct. | 4.60 – 4.90 mm. |
| 0.50 – 0.57 ct. | 4.90 – 5.30 mm. |
| 0.60 – 0.65 ct. | 5.30 – 5.70 mm. |
| 0.70 – 0.75 ct. | 5.50 – 5.80 mm. |
| 0.80 – 0.85 ct. | 5.80 – 6.00 mm. |
| 0.90 – 0.95 ct. | 5.90 – 6.30 mm. |
| 1.00 – 1.10 ct. | 6.10 – 6.50 mm. |
| 1.20 – 1.30 ct. | 6.60 – 7.00 mm. |
| 1.50 – 1.60 ct. | 7.10 – 8.50 mm. |
| 1.70 – 1.80 ct. | 7.50 – 8.30 mm. |
| 2.00 – 2.20 ct. | 7.90 – 8.20 mm. |
| 2.40 – 2.60 ct. | 8.00 – 8.50 mm. |
| 2.70 – 2.85 ct. | 8.40 – 9.00 mm. |
| 3.00 – 3.20 ct. | 8.90 – 9.30 mm. |
| 3.40 – 3.60 ct. | 9.00 – 9.40 mm. |
| 4.00 – 4.20 ct. | 9.30 – 9.50 mm. |
| 4.40 – 4.60 ct. | 9.40 – 9.80 mm. |
| 5.00 – 5.20 ct. | 9.80 – 10.80 mm. |
Recommended Dpeth and Table for Heart Shapes
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 53% – 63% | 52% or 64% – 65% |
51% or 66% – 68% |
| Depth – % | 58% – 62% | 56% – 57.9% or 62.1% – 66% |
53% – 55.9% or 66.1% – 71% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Recommended Length to Width Ratio in Heart Cut Diamonds?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 0.95 – 1.02 | 0.89 – 0.94 or 1.03 – 1.05 | 0.83 – 0.87 or 1.06 – 1.10 |
Professional Marquise Diamond Size Chart
CT to MM / MM to CT Marquise Shaped Diamond Size Comparison Chart
Marquise Cut Diamond CT to MM / MM CT Conversion Shart for 0.04 – 1.10 cts
| MARQUISE CUT CARAT WEIGHT | MARQUISE CUT LENGTH MM SIZE | MARQUISE CUT WIDTH MM SIZE |
|---|---|---|
| 0.04 – 0.07 ct. | 3.80 – 4.30 mm. | 1.80 – 2.10 mm. |
| 0.08 – 0.12 ct. | 4.20 – 4.90 mm. | 2.20 – 2.60 mm. |
| 0.13 – 0.17 ct. | 4.90 – 5.70 mm. | 2.50 – 2.90 mm. |
| 0.18 – 0.22 ct. | 5.60 – 6.30 mm. | 2.90 – 3.30 mm. |
| 0.23 – 0.28 ct. | 6.00 – 6.70 mm. | 3.10 – 3.40 mm. |
| 0.30 – 0.37 ct. | 6.50 – 7.20 mm. | 3.40 – 3.70 mm. |
| 0.40 – 0.48 ct. | 7.10 – 7.80 mm. | 3.70 – 4.20 mm. |
| 0.50 – 0.59 ct. | 7.50 – 8.50 mm. | 4.00 – 4.30 mm. |
| 0.60 – 0.67 ct. | 8.50 – 8.90 mm. | 4.20 – 4.50 mm. |
| 0.70 – 0.78 ct. | 8.80 – 9.30 mm. | 4.40 – 4.70 mm. |
| 0.80 – 0.88 ct. | 9.30 – 9.80 mm. | 4.70 – 4.80 mm. |
| 0.90 – 0.98 ct. | 9.30 – 10.00 mm. | 4.80 – 5.10 mm. |
| 1.00 – 1.10 ct. | 9.80 – 11.00 mm. | 5.00 – 5.30 mm. |
Marquise Cut Diamond CT to MM / MM CT Conversion Shart for 0.04 – 1.10 cts
| MARQUISE CUT CARAT WEIGHT | MARQUISE CUT LENGTH MM SIZE | MARQUISE CUT WIDTH MM SIZE |
|---|---|---|
| 1.20 – 1.27 ct | 10.60 – 11.50 mm. | 5.30 – 5.50 mm. |
| 1.30 – 1.45 ct | 11.30 – 12.00 mm. | 5.60 – 5.70 mm. |
| 1.50 – 1.60 ct | 11.80 – 12.20 mm. | 5.80 – 6.00 mm. |
| 1.65 – 1.80 ct | 12.30 – 12.50 mm. | 6.00 – 6.20 mm. |
| 2.00 – 2.30 ct | 12.60 – 13.50 mm. | 6.30 – 6.50 mm. |
| 2.40 – 2.60 ct | 13.60 – 14.40 mm. | 6.60 – 7.00 mm. |
| 2.70 – 2.90 ct | 14.40 – 14.80 mm. | 7.00 – 7.40 mm. |
| 3.00 – 3.30 ct | 14.60 – 15.30 mm. | 7.50 – 7.70 mm. |
| 3.40 – 3.60 ct | 15.50 – 16.10 mm. | 7.70 – 7.90 mm. |
| 3.70 – 3.90 ct | 16.20 – 16.40 mm. | 8.00 – 8.20 mm. |
| 4.00 – 4.20 ct | 16.40 – 16.80 mm. | 8.20 – 8.40 mm. |
| 4.40 – 4.70 ct | 16.70 – 17.30 mm. | 8.30 – 8.50 mm. |
| 5.00 – 5.25 ct | 17.40 – 17.80 mm. | 8.60 – 9.20 mm. |
What is the Ideal Diamond Depth and Table for the Marquise Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% |
54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 60.9% or 67.1% – 70% |
57% – 58.9% or 70.1% – 74% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the recommended Length to Width Ratio of Marquise Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.85 – 2.00 | 1.75 – 1.84 or 2.01 – 2.15 | 1.65 – 1.74 or 2.16 – 2.30 |
Professional Baguette Diamond Size Chart
Baguette Shaped Diamond Size Comparison of CT to MM / MM to CT
Tapered Baguette MM Width
| MM Length | 1.20 1.30 | 1.40 1.50 | 1.60 1.70 | 1.80 1.90 | 2.00 2.10 | 2.20 2.30 | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
2.50 2.60 | 0.03 0.04 | 0.04 0.05 | 0.05 0.06 | 0.06 0.07 | 0.08 0.09 | 0.09 0.10 | 0.10 0.11 | 0.11 0.12 | 0.13 0.14 | 0.14 0.15 |
2.70 2.80 | 0.03 0.04 | 0.04 0.05 | 0.04 0.05 | 0.06 0.08 | 0.08 0.10 | 0.09 0.11 | 0.10 0.12 | 0.12 0.13 | 0.12 0.14 | 0.14 0.16 |
| 3.90 4.00 | 0.06 0.08 | 0.07 0.09 | 0.08 0.10 | 0.10 0.12 | 0.12 0.14 | 0.13 0.15 | 0.17 0.18 | 0.18 0.19 | 0.20 0.22 | 0.21 0.24 |
| 4.10 4.20 | 0.06 0.08 | 0.07 0.09 | 0.08 0.10 | 0.11 0.13 | 0.12 0.14 | 0.14 0.16 | 0.17 0.19 | 0.19 0.21 | 0.21 0.23 | 0.23 0.25 |
| 4.30 4.40 | 0.08 0.09 | 0.09 0.11 | 0.10 0.12 | 0.13 0.15 | 0.14 0.16 | 0.15 0.18 | 0.18 0.20 | 0.21 0.23 | 0.23 0.26 | 0.26 0.28 |
| 4.50 4.60 | 0.09 0.10 | 0.10 0.12 | 0.11 0.13 | 0.14 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.21 | 0.22 0.24 | 0.24 0.27 | 0.27 0.30 |
| 4.70 4.80 | 0.10 0.11 | 0.11 0.12 | 0.12 0.14 | 0.15 0.16 | 0.16 0.18 | 0.18 0.20 | 0.20 0.22 | 0.23 0.25 | 0.25 0.28 | 0.28 0.31 |
| 4.90 5.00 | 0.10 0.12 | 0.11 0.13 | 0.12 0.15 | 0.14 0.16 | 0.17 0.18 | 0.18 0.21 | 0.21 0.23 | 0.23 0.26 | 0.27 0.30 | 0.30 0.33 |
| 5.10 5.20 | 0.11 0.13 | 0.12 0.14 | 0.13 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.22 | 0.22 0.23 | 0.24 0.28 | 0.28 0.32 | 0.31 0.35 |
| 5.30 5.40 | 0.11 0.14 | 0.13 0.15 | 0.15 0.17 | 0.16 0.18 | 0.18 0.20 | 0.21 0.23 | 0.23 0.25 | 0.25 0.29 | 0.28 0.33 | 0.33 0.37 |
| 5.50 5.60 | 0.11 0.14 | 0.13 0.16 | 0.15 0.18 | 0.17 0.20 | 0.20 0.22 | 0.22 0.24 | 0.25 0.29 | 0.28 0.31 | 0.30 0.35 | 0.35 0.39 |
Professional Tapered Baguette Diamond Size Chart
Realistic CT to MM / MM to CT Tapered Baguette Size Comparison
Tapered Baguette MM Width
| MM Length | 1.20 1.30 | 1.40 1.50 | 1.60 1.70 | 1.80 1.90 | 2.00 2.10 | 2.20 2.30 | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
| 2.50 2.60 | 0.02 0.03 | 0.03 0.04 | 0.04 0.05 | 0.05 0.06 | 0.07 0.07 | 0.07 0.08 | 0.08 0.09 | 0.09 0.10 | 0.11 0.11 | 0.11 0.12 |
| 2.70 2.80 | 0.02 0.03 | 0.03 0.04 | 0.04 0.05 | 0.05 0.07 | 0.07 0.08 | 0.08 0.09 | 0.08 0.10 | 0.10 0.11 | 0.10 0.11 | 0.11 0.13 |
| 2.90 3.00 | 0.03 0.04 | 0.04 0.06 | 0.05 0.06 | 0.06 0.07 | 0.07 0.09 | 0.09 0.10 | 0.09 0.11 | 0.11 0.11 | 0.11 0.13 | 0.11 0.13 |
| 3.10 3.20 | 0.03 0.05 | 0.04 0.06 | 0.05 0.06 | 0.06 0.07 | 0.07 0.09 | 0.09 0.11 | 0.10 0.11 | 0.11 0.12 | 0.12 0.14 | 0.12 0.14 |
| 3.30 3.40 | 0.04 0.06 | 0.05 0.07 | 0.06 0.07 | 0.07 0.07 | 0.07 0.09 | 0.08 0.10 | 0.11 0.11 | 0.11 0.13 | 0.13 0.14 | 0.13 0.15 |
| 3.50 3.60 | 0.05 0.06 | 0.06 0.07 | 0.07 0.07 | 0.07 0.08 | 0.08 0.09 | 0.09 0.10 | 0.11 0.12 | 0.12 0.14 | 0.12 0.15 | 0.14 0.15 |
| 3.70 3.80 | 0.05 0.06 | 0.06 0.07 | 0.07 0.07 | 0.08 0.09 | 0.08 0.10 | 0.10 0.11 | 0.12 0.13 | 0.14 0.15 | 0.15 0.16 | 0.16 0.18 |
| 3.90 | 0.05 0.07 | 0.06 0.07 | 0.07 0.08 | 0.08 | 0.10 | 0.11 | 0.14 | 0.15 | 0.16 | 0.17 |
| 4.10 4.20 | 0.05 0.07 | 0.06 0.07 | 0.07 0.08 | 0.09 0.11 | 0.10 0.11 | 0.11 0.13 | 0.14 0.16 | 0.16 0.17 | 0.17 0.19 | 0.19 0.21 |
| 4.30 4.40 | 0.07 0.07 | 0.07 0.09 | 0.08 0.10 | 0.11 0.12 | 0.11 0.13 | 0.12 0.15 | 0.15 0.16 | 0.17 0.19 | 0.19 0.21 | 0.21 0.23 |
| 4.50 4.60 | 0.07 0.08 | 0.08 0.10 | 0.09 0.11 | 0.11 0.12 | 0.12 0.14 | 0.14 0.16 | 0.16 0.17 | 0.18 0.20 | 0.20 0.22 | 0.22 0.25 |
| 4.70 4.80 | 0.08 0.09 | 0.09 0.10 | 0.10 0.11 | 0.12 0.13 | 0.13 0.15 | 0.15 0.16 | 0.16 0.18 | 0.19 0.21 | 0.21 0.23 | 0.23 0.25 |
| 4.90 5.00 | 0.08 0.10 | 0.09 0.11 | 0.10 0.12 | 0.11 0.13 | 0.14 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.21 | 0.22 0.25 | 0.25 0.27 |
| 5.10 5.20 | 0.09 0.11 | 0.10 0.11 | 0.11 0.12 | 0.12 0.14 | 0.14 0.16 | 0.16 0.18 | 0.18 0.19 | 0.20 0.23 | 0.23 0.26 | 0.25 0.29 |
| 5.30 5.40 | 0.09 0.11 | 0.11 0.12 | 0.12 0.14 | 0.13 0.15 | 0.15 0.16 | 0.17 0.19 | 0.19 0.21 | 0.21 0.24 | 0.23 0.27 | 0.27 0.30 |
| 5.50 5.60 | 0.09 0.11 | 0.11 0.13 | 0.12 0.15 | 0.14 0.16 | 0.16 0.18 | 0.18 0.20 | 0.21 0.24 | 0.23 0.25 | 0.25 0.29 | 0.29 0.32 |
Professional Carre Cut Diamond Size Chart
CT to MM and MM to Carat Carre Cut Size Comparison
Carre Cut Diamond Conversion Chart From CT to MM / MM to CT for 0.05 – 1.05 cts
| CARRE CUT CARAT WEIGHT | CARRE CUT MM SIZE |
|---|---|
| 0.05 – 0.06 ct. | 1.90 – 2.00 mm. |
| 0.06 – 0.07 ct. | 2.10 – 2.20 mm. |
| 0.08 – 0.09 ct. | 2.30 – 2.40 mm. |
| 0.10 – 0.12 ct. | 2.50 – 2.60 mm. |
| 0.13 – 0.14 ct. | 2.70 – 2.80 mm. |
| 0.15 – 0.17 ct. | 2.90 – 3.00 mm. |
| 0.18 – 0.21 ct. | 3.10 – 3.20 mm. |
| 0.22 – 0.25 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.29 ct. | 3.50 – 3.60 mm. |
| 0.30 – 0.36 ct. | 3.70 – 3.80 mm. |
| 0.37 – 0.42 ct. | 3.90 – 4.00 mm. |
| 0.42 – 0.47 ct. | 4.10 – 4.20 mm. |
| 0.47 – 0.53 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.00 mm. |
| 0.80 – 0.85 ct. | 5.10 – 5.20 mm. |
| 0.90 – 1.05 ct. | 5.30 – 5.40 mm. |
| 1.00 – 1.05 ct. | 5.50 – 5.60 mm. |
Professional Trapezoid Cut Diamond Size Chart
CT TO MM / MM to CT Size Comparison Tool for Trapezoid Diamonds
Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.28 – 0.32 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. | 2.60 – 2.75 mm. |
| 0.31 – 0.35 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. | 2.60 – 2.75 mm. |
| 0.31 – 0.34 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. | 2.90 – 3.00 mm. |
| 0.38 – 0.44 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. | 2.90 – 3.00 mm. |
| 0.32 – 0.37 ct tw | 4.10 – 4.20 mm. | 2.70 – 2.80 mm. | 3.10 – 3.20 mm. |
| 0.40 – 0.44 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. | 3.20 – 3.45 mm. |
| 0.38 – 0.44 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. | 3.30 – 3.50 mm. |
| 0.43 – 0.47 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. | 3.30 – 3.50 mm. |
| 0.40 – 0.44 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. | 3.60 – 3.90 mm. |
| 0.44 – 0.47 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. | 3.60 – 3.90 mm. |
| 0.40 – 0.45 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. | 3.90 – 4.10 mm. |
| 0.50 – 0.55 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. | 3.90 – 4.10 mm. |
| 0.58 – 0.64 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. | 3.95 – 4.20 mm. |
| 0.55 – 0.64 ct tw | 5.40 – 5.60 mm. | 2.90 – 3.10 mm. | 4.30 – 4.50 mm. |
| 0.64 – 0.75 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. | 4.00 – 4.40 mm. |
| 0.58 – 0.75 ct tw | 5.90 – 6.20 mm. | 2.90 – 3.10 mm. | 4.70 – 5.00 mm. |
| 0.75 – 0.85 ct tw | 5.90 – 6.20 mm. | 3.30 – 3.50 mm. | 4.90 – 5.10 mm. |
| 0.80 – 1.00 ct tw | 5.90 – 6.20 mm. | 3.60 – 4.00 mm. | 4.50 – 4.80 mm. |
| 0.85 – 1.10 ct tw | 6.40 – 6.60 mm. | 3.80 – 4.20 mm. | 4.80 – 5.20 mm. |
| 0.97 – 1.20 ct tw | 6.40 – 6.60 mm. | 4.00 – 4.30 mm. | 4.80 – 5.20 mm. |
| 1.10 – 1.30 ct tw | 6.80 – 7.20 mm. | 4.00 – 4.30 mm. | 5.00 – 5.50 mm. |
Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.29 – 0.33 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. | 2.60 – 2.75 mm. |
| 0.32 – 0.36 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. | 2.60 – 2.75 mm. |
| 0.32 – 0.35 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. | 2.90 – 3.00 mm. |
| 0.39 – 0.45 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. | 2.90 – 3.00 mm. |
| 0.33 – 0.38 ct tw | 4.10 – 4.20 mm. | 2.70 – 2.80 mm. | 3.10 – 3.20 mm. |
| 0.41 – 0.46 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. | 3.20 – 3.45 mm. |
| 0.39 – 0.45 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. | 3.30 – 3.50 mm. |
| 0.44 – 0.48 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. | 3.30 – 3.50 mm. |
| 0.41 – 0.45 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. | 3.60 – 3.90 mm. |
| 0.45 – 0.49 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. | 3.60 – 3.90 mm. |
| 0.41 – 0.47 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. | 3.90 – 4.10 mm. |
| 0.51 – 0.57 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. | 3.90 – 4.10 mm. |
| 0.59 – 0.66 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. | 3.95 – 4.20 mm. |
| 0.57 – 0.67 ct tw | 5.40 – 5.60 mm. | 2.90 – 3.10 mm. | 4.30 – 4.50 mm. |
| 0.66 – 0.77 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. | 4.00 – 4.40 mm. |
| 0.60 – 0.78 ct tw | 5.90 – 6.20 mm. | 2.90 – 3.10 mm. | 4.70 – 5.00 mm. |
| 0.77 – 0.88 ct tw | 5.90 – 6.20 mm. | 3.30 – 3.50 mm. | 4.90 – 5.10 mm. |
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.29 – 0.33 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. | 2.60 – 2.75 mm |
| 0.32 – 0.36 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. | 2.60 – 2.75 mm |
| 0.32 – 0.35 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. | 2.90 – 3.00 mm |
| 0.39 – 0.45 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. | 2.90 – 3.00 mm |
| 0.33 – 0.38 ct tw | 4.10 – 4.20 mm. | 2.70 – 2.80 mm. | 3.10 – 3.20 mm |
| 0.41 – 0.46 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. | 3.20 – 3.45 mm |
| 0.39 – 0.45 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. | 3.30 – 3.50 mm |
| 0.44 – 0.48 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. | 3.30 – 3.50 mm |
| 0.41 – 0.45 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. | 3.60 – 3.90 mm |
| 0.45 – 0.49 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. | 3.60 – 3.90 mm |
| 0.41 – 0.47 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. | 3.90 – 4.10 mm |
| 0.51 – 0.57 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. | 3.90 – 4.10 mm |
| 0.59 – 0.66 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. | 3.95 – 4.20 mm |
| 0.57 – 0.67 ct tw | 5.40 – 5.60 mm. | 2.90 – 3.10 mm. | 4.30 – 4.50 mm |
| 0.66 – 0.77 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. | 4.00 – 4.40 mm |
| 0.60 – 0.78 ct tw | 5.90 – 6.20 mm. | 2.90 – 3.10 mm. | 4.70 – 5.00 mm |
| 0.77 – 0.88 ct tw | 5.90 – 6.20 mm. | 3.30 – 3.50 mm. | 4.90 – 5.10 mm |
| 0.80 – 1.10 ct tw | 5.90 – 6.20 mm. | 3.60 – 4.00 mm. | 4.50 – 4.80 mm. |
| 0.90 – 1.15 ct tw | 6.40 – 6.60 mm. | 3.80 – 4.20 mm. | 4.80 – 5.20 mm. |
| 1.00 – 1.25 ct tw | 6.40 – 6.60 mm. | 4.00 – 4.30 mm. | 4.80 – 5.20 mm. |
| 1.15 – 1.40 ct tw | 6.80 – 7.20 mm. | 4.00 – 4.30 mm. | 5.00 – 5.50 mm. |
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.22 – 0.26 ct tw | 3.70 – 4.00 mm. | 2.50 – 2.70 mm. | 1.70 – 1.80 mm. |
| 0.26 – 0.30 ct tw | 4.00 – 4.50 mm. | 2.70 – 3.00 mm. | 1.85 – 2.00 mm. |
| 0.30 – 0.34 ct tw | 4.20 – 4.60 mm. | 2.85 – 3.15 mm. | 1.90 – 2.10 mm. |
| 0.36 – 0.38 ct tw | 4.40 – 4.70 mm. | 3.00 – 3.20 mm. | 2.00 – 2.15 mm. |
| 0.38 – 0.42 ct tw | 4.70 – 4.90 mm. | 3.15 – 3.30 mm. | 2.15 – 2.25 mm. |
| 0.42 – 0.46 ct tw | 4.90 – 5.20 mm. | 3.30 – 3.50 mm. | 2.25 – 2.40 mm. |
| 0.48 – 0.50 ct tw | 5.20 – 5.50 mm. | 3.50 – 3.75 mm. | 2.40 – 2.50 mm. |
| 0.52 – 0.58 ct tw | 5.50 – 5.70 mm. | 3.75 – 3.85 mm. | 2.50 – 2.60 mm. |
| 0.62 – 0.66 ct tw | 5.60 – 5.90 mm. | 3.80 – 4.00 mm. | 2.60 – 2.70 mm. |
| 0.70 – 0.76 ct tw | 5.90 – 6.30 mm. | 4.00 – 4.25 mm. | 2.70 – 2.90 mm. |
| 0.78 – 0.80 ct tw | 6.20 – 6.50 mm. | 4.10 – 4.30 mm. | 2.85 – 3.00 mm. |
| 0.84 – 0.92 ct tw | 6.40 – 6.70 mm. | 4.15 – 4.40 mm. | 2.95 – 3.10 mm. |
| 0.96 – 1.02 ct tw | 6.60 – 6.80 mm. | 4.15 – 4.40 mm. | 3.00 – 3.15 mm. |
| 1.06 – 1.14 ct tw | 6.80 – 7.30 mm. | 4.25 – 4.60 mm. | 3.15 – 3.35 mm. |
| 1.24 – 1.38 ct tw | 7.20 – 7.50 mm. | 4.55 – 4.75 mm. | 3.30 – 3.45 mm. |
| 1.40 – 1.54 ct tw | 7.40 – 7.70 mm. | 4.70 – 4.85 mm. | 3.40 – 3.55 mm. |
| 1.58 – 1.72 ct tw | 7.60 – 8.10 mm. | 4.75 – 5.10 mm. | 3.50 – 3.70 mm. |
| 1.76 – 2.00 ct tw | 8.00 – 8.70 mm. | 5.00 – 5.50 mm. | 3.70 – 4.00 mm. |
| 2.10 – 2.60 ct tw | 8.40 – 9.40 mm. | 5.25 – 5.80 mm. | 3.90 – 4.30 mm. |
Professional Half Moon Cut Diamond Size Chart
MM to CT / CT TO MM Size Comparison Tool of Half Moon Shaped Diamonds
Half Moon Cut Diamond Conversion Charts From CT to MM / MM to CT for 0.25 – 1.30 ctw
| PAIR AVERAGE TOTAL WEIGHT | HALF MOON LENGTH MM SIZE | HALF MOON WIDTH MM SIZE |
|---|---|---|
| 0.25 – 0.27 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. |
| 0.28 – 0.32 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. |
| 0.30 – 0.35 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. |
| 0.36 – 0.38 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. |
| 0.30 – 0.33 ct tw | 4.20 – 4.30 mm. | 2.70 – 2.80 mm. |
| 0.36 – 0.40 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. |
| 0.36 – 0.39 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. |
| 0.42 – 0.45 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. |
| 0.38 – 0.43 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. |
| 0.43 – 0.46 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. |
| 0.39 – 0.44 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. |
| 0.46 – 0.50 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. |
| 0.53 – 0.57 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. |
| 0.56 – 0.61 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. |
| 0.70 – 0.80 ct tw | 5.90 – 6.20 mm. | 3.40 – 3.70 mm. |
| 0.90 – 1.00 ct tw | 5.90 – 6.20 mm. | 3.80 – 4.20 mm. |
| 0.95 – 1.20 ct tw | 6.40 – 6.60 mm. | 4.00 – 4.30 mm. |
| 1.10 – 1.30 ct tw | 6.80 – 7.20 mm. | 4.20 – 4.50 mm. |
Straight Bullet MM Width
| MM Length | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
|---|---|---|---|---|
| 3.90 4.00 | 0.15 0.16 | 0.16 0.17 | 0.18 0.19 | 0.18 0.21 |
| 4.10 4.20 | 0.15 0.17 | 0.17 0.18 | 0.18 0.20 | 0.20 0.22 |
| 4.30 4.40 | 0.16 0.18 | 0.18 0.20 | 0.20 0.23 | 0.23 0.25 |
| 4.50 4.60 | 0.17 0.18 | 0.19 0.21 | 0.21 0.24 | 0.24 0.26 |
| 4.70 4.80 | 0.18 0.19 | 0.20 0.22 | 0.22 0.25 | 0.25 0.27 |
| 4.90 5.00 | 0.18 0.20 | 0.20 0.23 | 0.24 0.26 | 0.26 0.29 |
| 5.10 5.20 | 0.19 0.20 | 0.21 0.25 | 0.25 0.28 | 0.27 0.31 |
| 5.30 5.40 | 0.20 0.22 | 0.22 0.26 | 0.25 0.29 | 0.29 0.33 |
| 5.50 5.60 | 0.22 0.26 | 0.25 0.27 | 0.26 0.31 | 0.31 0.34 |
Professional Tapered Bullet Cut Diamond Size Chart
Size Comparison Tool of Tapered Bullet Shaped Diamonds From CT to MM / MM to CT
Tapered Bullet MM Width
| MM Length | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
|---|---|---|---|---|
| 3.90 4.00 | 0.12 0.13 | 0.13 0.13 | 0.14 0.15 | 0.15 0.17 |
| 4.10 4.20 | 0.12 0.13 | 0.13 0.15 | 0.15 0.16 | 0.16 0.18 |
| 4.30 4.40 | 0.13 0.14 | 0.15 0.16 | 0.16 0.18 | 0.18 0.20 |
| 4.50 4.60 | 0.13 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.21 |
| 4.70 4.80 | 0.14 0.15 | 0.16 0.18 | 0.18 0.20 | 0.20 0.22 |
| 4.90 5.00 | 0.15 0.16 | 0.16 0.18 | 0.19 0.21 | 0.21 0.23 |
| 5.10 5.20 | 0.15 0.16 | 0.17 0.20 | 0.20 0.22 | 0.22 0.25 |
| 5.30 5.40 | 0.20 0.22 | 0.18 0.20 | 0.20 0.23 | 0.23 0.26 |
| 5.50 5.60 | 0.18 0.20 | 0.20 0.22 | 0.21 0.25 | 0.25 0.27 |
Professional Shield Cut Diamond Size Chart
Size Comparison Tool for Shieldt Shaped Diamonds From CT to MM / MM to CT
Shield Cut Diamond Conversion Chart 0.13 – 1.45 ctw
| PAIR AVERAGE TOTAL WEIGHT | LENGTH MM SIZE | WIDTH MM SIZE |
|---|---|---|
| 0.13 – 0.17 ct tw | 3.60 – 4.10 mm. | 3.20 – 2.90 mm. |
| 0.18 – 0.22 ct tw | 4.20 – 4.40 mm. | 3.60 – 4.00 mm. |
| 0.23 – 0.27 ct tw | 4.30 – 5.10 mm. | 3.90 – 4.80 mm. |
| 0.28 – 0.37 ct tw | 4.80 – 5.60 mm. | 4.20 – 5.00 mm. |
| 0.38 – 0.47 ct tw | 5.20 – 5.80 mm. | 4.80 – 5.30 mm. |
| 0.48 – 0.59 ct tw | 5.40 – 6.00 mm. | 5.00 – 5.80 mm. |
| 0.60 – 0.68 ct tw | 5.80 – 6.30 mm. | 5.40 – 6.00 mm. |
| 0.70 – 0.78 ct tw | 6.20 – 6.80 mm. | 6.10 – 6.80 mm. |
| 0.80 – 0.89 ct tw | 6.70 – 7.40 mm. | 6.50 – 7.20 mm. |
| 0.90 – 0.98 ct tw | 7.20 – 7.80 mm. | 6.30 – 7.30 mm. |
| 1.00 – 1.10 ct tw | 7.60 – 8.50 mm. | 6.70 – 7.60 mm. |
| 1.18 – 1.45 ct tw | 8.00 – 8.90 mm. | 7.20 – 8.10 mm. |
Professional Trilliant Cut Diamond Size Chart
MM to CT / CT to MM Trilliant Shaped DIamond Size Comparison Tool
Trilliant Cut Diamond CT to MM / MM to CT Size Chart
Trillion Base to Point From CT to MM for 0.04 – 0.69 cts
| CARAT WEIGHT | BASE TO POINT MM SIZE |
|---|---|
| 0.03 – 0.04 ct. | 2.20 – 2.40 mm. |
| 0.05 – 0.06 ct. | 2.50 – 2.80 mm. |
| 0.07 – 0.08 ct. | 3.00 – 3.20 mm. |
| 0.08 – 0.11 ct. | 3.10 – 3.30 mm. |
| 0.13 – 0.15 ct. | 3.30 – 3.60 mm. |
| 0.15 – 0.17 ct. | 3.60 – 4.10 mm. |
| 0.17 – 0.19 ct. | 3.80 – 4.20 mm. |
| 0.20 – 0.21 ct. | 4.00 – 4.30 mm. |
| 0.22 – 0.24 ct. | 4.20 – 4.40 mm. |
| 0.24 – 0.26 ct. | 4.40 – 4.70 mm. |
| 0.27 – 0.28 ct. | 4.70 – 5.00 mm. |
| 0.30 – 0.33 ct. | 5.00 – 5.10 mm. |
| 0.35 – 0.38 ct. | 5.10 – 5.30 mm. |
| 0.40 – 0.43 ct. | 5.30 – 5.70 mm. |
| 0.44 – 0.46 ct. | 5.60 – 5.90 mm. |
| 0.48 – 0.52 ct. | 5.70 – 6.00 mm. |
| 0.55 – 0.58 ct. | 5.90 – 6.20 mm. |
| 0.60 – 0.65 ct. | 6.10 – 6.60 mm. |
| 0.70 – 0.78 ct. | 6.50 – 6.80 mm. |
| 0.80 – 0.87 ct. | 6.70 – 6.90 mm. |
| 0.90 – 0.98 ct. | 6.80 – 7.30 mm. |
| 1.00 – 1.15 ct. | 7.20 – 7.80 mm. |
| 1.18 – 1.45 ct. | 7.50 – 8.30 mm. |
Trillion Base to Point From CT to MM for 0.70 – 5.25 cts
| CARAT WEIGHT | POINT TO POINT MM SIZE |
|---|---|
| 0.03 – 0.04 ct. | 2.40 – 2.60 mm. |
| 0.05 – 0.06 ct. | 2.80 – 3.10 mm. |
| 0.07 – 0.08 ct. | 3.20 – 3.50 mm. |
| 0.08 – 0.11 ct. | 3.40 – 3.70 mm. |
| 0.13 – 0.15 ct. | 3.70 – 4.00 mm. |
| 0.15 – 0.17 ct. | 4.00 – 4.50 mm. |
| 0.17 – 0.19 ct. | 4.20 – 4.60 mm. |
| 0.20 – 0.21 ct. | 4.40 – 4.70 mm. |
| 0.22 – 0.24 ct. | 4.70 – 4.90 mm. |
| 0.24 – 0.26 ct. | 4.90 – 5.20 mm. |
| 0.27 – 0.28 ct. | 5.20 – 5.50 mm. |
| 0.30 – 0.33 ct. | 5.50 – 5.70 mm. |
| 0.35 – 0.38 ct. | 5.60 – 5.90 mm. |
| 0.40 – 0.43 ct. | 5.90 – 6.30 mm. |
| 0.44 – 0.46 ct. | 6.20 – 6.50 mm. |
| 0.48 – 0.52 ct. | 6.40 – 6.70 mm. |
| 0.55 – 0.58 ct. | 6.60 – 6.80 mm. |
| 0.60 – 0.65 ct. | 6.80 – 7.30 mm. |
| 0.70 – 0.78 ct. | 7.20 – 7.50 mm. |
| 0.80 – 0.87 ct. | 7.40 – 7.70 mm. |
| 0.90 – 0.98 ct. | 7.60 – 8.10 mm. |
| 1.00 – 1.15 ct. | 8.00 – 8.70 mm. |
| 1.18 – 1.45 ct. | 8.40 – 9.40 mm. |
Professional Size Conversion Chart for Calf Cut Diamonds
Calf Cut Diamond Conversion Chart – CT to MM / MM to CT
Cushion Cut MM to Carat Diamond Conversion Charts For 0.12 – 1.38 cts
| CARAT WEIGHT | TOP HORIZONTAL LENGTH MM SIZE | VERTICAL WIDTH MM SIZE |
|---|---|---|
| 0.12 – 0.14 ct. | 3.50 – 3.80 mm. | 3.20 – 3.40 mm. |
| 0.14 – 0.16 ct. | 3.80 – 4.30 mm. | 3.40 – 3.80 mm. |
| 0.16 – 0.18 ct. | 4.00 – 4.40 mm. | 3.60 – 3.90 mm. |
| 0.19 – 0.20 ct. | 4.20 – 4.50 mm. | 3.70 – 4.00 mm. |
| 0.21 – 0.23 ct. | 4.40 – 4.70 mm. | 4.00 – 4.20 mm. |
| 0.23 – 0.25 ct. | 4.60 – 5.00 mm. | 4.20 – 4.40 mm. |
| 0.26 – 0.27 ct. | 5.00 – 5.20 mm. | 4.40 – 4.70 mm. |
| 0.29 – 0.31 ct. | 5.20 – 5.40 mm. | 4.70 – 4.90 mm. |
| 0.33 – 0.36 ct. | 5.30 – 5.60 mm. | 4.80 – 5.00 mm. |
| 0.38 – 0.41 ct. | 5.60 – 6.00 mm. | 5.00 – 5.40 mm. |
| 0.42 – 0.44 ct. | 5.90 – 6.20 mm. | 5.30 – 5.50 mm. |
| 0.46 – 0.49 ct. | 6.10 – 6.30 mm. | 5.50 – 5.70 mm. |
| 0.52 – 0.55 ct. | 6.30 – 6.40 mm. | 5.70 – 5.80 mm. |
| 0.57 – 0.62 ct. | 6.40 – 6.90 mm. | 6.40 – 6.90 mm. |
| 0.67 – 0.74 ct. | 6.90 – 7.10 mm. | 6.80 – 7.10 mm. |
Professional Size Conversion Chart for Calf Cut Diamonds
Calf Cut Diamond Conversion Chart – CT to MM / MM to CT For 0.12 – 1.38 cts
| CARAT WEIGHT | TOP HORIZONTAL LENGTH MM SIZE | VERTICAL WIDTH MM SIZE |
|---|---|---|
| 0.12 – 0.14 ct. | 3.50 – 3.80 mm. | 3.20 – 3.40 mm. |
| 0.14 – 0.16 ct. | 3.80 – 4.30 mm. | 3.40 – 3.80 mm. |
| 0.16 – 0.18 ct. | 4.00 – 4.40 mm. | 3.60 – 3.90 mm. |
| 0.19 – 0.20 ct. | 4.20 – 4.50 mm. | 3.70 – 4.00 mm. |
| 0.21 – 0.23 ct. | 4.40 – 4.70 mm. | 4.00 – 4.20 mm. |
| 0.23 – 0.25 ct. | 4.60 – 5.00 mm. | 4.20 – 4.40 mm. |
| 0.26 – 0.27 ct. | 5.00 – 5.20 mm. | 4.40 – 4.70 mm. |
| 0.29 – 0.31 ct. | 5.20 – 5.40 mm. | 4.70 – 4.90 mm. |
| 0.33 – 0.36 ct. | 5.30 – 5.60 mm. | 4.80 – 5.00 mm. |
| 0.38 – 0.41 ct. | 5.60 – 6.00 mm. | 5.00 – 5.40 mm. |
| 0.42 – 0.44 ct. | 5.90 – 6.20 mm. | 5.30 – 5.50 mm. |
| 0.46 – 0.49 ct. | 6.10 – 6.30 mm. | 5.50 – 5.70 mm. |
| 0.52 – 0.55 ct. | 6.30 – 6.40 mm. | 5.70 – 5.80 mm. |
| 0.57 – 0.62 ct. | 6.40 – 6.90 mm. | 6.40 – 6.90 mm. |
| 0.67 – 0.74 ct. | 6.90 – 7.10 mm. | 6.80 – 7.10 mm. |
| 0.76 – 0.83 ct. | 7.00 – 7.30 mm. | 7.00 – 7.30 mm. |
| 0.86 – 0.93 ct. | 7.20 – 7.70 mm. | 7.20 – 7.70 mm. |
| 0.95 – 1.09 ct. | 7.60 – 8.20 mm. | 7.60 – 8.25 mm. |
| 1.12 – 1.38 ct. | 8.00 – 8.90 mm. | 8.00 – 8.90 mm. |
MM to CT Round Cut Size Comparison Tool
Brilliant Round Cut Diamond Carat MM
0.21 – 5.20 cts
| ROUND CUT CARAT WEIGHT | ROUND CUT MM SIZE |
|---|---|
| 0.21 – 0.22 ct | 3.80 – 3.90 mm |
| 0.23 – 0.24 ct | 3.90 – 4.00 mm |
| 0.25 – 0.26 ct | 4.00 – 4.10 mm |
| 0.26 – 0.27 ct | 4.10 – 4.20 mm |
| 0.27 – 0.28 ct | 4.20 – 4.30 mm |
| 0.30 – 0.36 ct | 4.40 – 4.50 mm |
| 0.40 – 0.45 ct | 4.60 – 4.70 mm |
| 0.46 – 0.48 ct | 4.90 – 5.00 mm |
| 0.50 – 0.57 ct | 5.10 – 5.30 mm |
| 0.60 – 0.67 ct | 5.40 – 5.60 mm |
| 0.70 – 0.77 ct | 5.70 – 5.90 mm |
| 0.80 – 0.85 ct | 6.00 – 6.10 mm |
| 0.90 – 0.95 ct | 6.20 – 6.30 mm |
| 1.00 – 1.10 ct | 6.40 – 6.60 mm |
| 1.22 – 1.26 ct | 6.70 – 6.80 mm |
| 1.28 – 1.30 ct | 6.90 – 7.10 mm |
| 1.50 – 1.55 ct | 7.20 – 7.40 mm |
| 1.67 – 1.80 ct | 7.50 – 7.90 mm |
| 2.00 – 2.10 ct | 8.10 – 8.30 mm |
| 2.40 – 2.60 ct | 8.50 – 8.80 mm |
| 2.70 – 2.80 ct | 8.90 – 9.10 mm |
| 3.00 – 3.10 ct | 9.20 – 9.40 mm |
| 3.30 – 3.40 ct | 9.50 – 9.60 mm |
| 3.50 – 3.70 ct | 9.70 – 9.80 mm |
| 3.80 – 3.90 ct | 9.90 – 10.00 mm |
| 4.00 – 4.10 ct | 10.10 – 10.20 mm |
| 4.30 – 4.40 ct | 10.30 – 10.50 mm |
| 4.50 – 4.60 ct | 10.60 – 10.70 mm |
| 4.70 – 4.80 ct | 10.80 – 10.90 mm |
| 4.90 – 4.99 ct | 10.90 – 11.00 mm |
| 5.00 – 5.20 ct | 11.10 – 11.20 mm |
Round Cut Melee Diamond Conversion of CT MM / MM to Carat And Sieve Size Chart
0.005 – 0.20 cts
| ROUND CUT CARAT WEIGHT | ROUND CUT MM SIZE | CTS/PCS | ROUND CUT SIEVE SIZES |
|---|---|---|---|
| 0.005 ct | 0.90-1.10 mm | 1/200 | +000/-0 |
| 0.006 ct | 1.10-1.15 mm | 1/175 | +0/-1 |
| 0.007 ct | 1.15-1.20 mm | 1/150 | +1/-1.5 |
| 0.008 ct | 1.20-1.25 mm | 1/120 | +1.5/-2 |
| 0.009 ct | 1.25-1.30 mm | 1/100 | +2/-2.5 |
| 0.010 ct | 1.30-1.35 mm | 1/100 | +2.5/-3 |
| 0.011 ct | 1.35-1.40 mm | 1/100 | +3/-3.5 |
| 0.012 ct | 1.40-1.45 mm | 1/80 | +3.5/-4 |
| 0.013 ct | 1.45-1.50 mm | 1/80 | +4/-4.5 |
| 0.014 ct | 1.50-1.55 mm | 1/70 | +4.5/-5 |
| 0.016 ct | 1.55-1.60 mm | 1/60 | +5/-5.5 |
| 0.018 ct | 1.60-1.70 mm | 1/50 | +5.5/-6 |
| 0.021 ct | 1.70-1.80 mm | 1/50 | +6/-6.5 |
| 0.025 ct | 1.80-1.90 mm | 1/40 | +6.5/-7 |
| 0.029 ct | 1.90-2.00 mm | 1/30 | +7/-7.5 |
| 0.035 ct | 2.00-2.10 mm | 1/30 | +7.5/-8 |
| 0.039 ct | 2.10-2.20 mm | 1/25 | +8/-8.5 |
| 0.044 ct | 2.20-2.30 mm | 1/25 | +8.5/-9 |
| 0.052 ct | 2.30-2.40 mm | 1/20 | +9/-9.5 |
| 0.058 ct | 2.40-2.50 mm | 1/20 | +9.5/-10 |
| 0.069 ct | 2.50-2.60 mm | 1/15 | +10/-10.5 |
| 0.074 ct | 2.60-2.70 mm | 1/15 | +10.5/-11 |
| 0.078 ct | 2.70-2.80 mm | 1/12 | +11/-11.5 |
| 0.086 ct | 2.80-2.90 mm | 1/12 | +11.5/-12 |
| 0.095 ct | 2.90-3.00 mm | 1/10 | +12/-12.5 |
| 0.108 ct | 3.00-3.10 mm | 1/10 | +12.5/-13 |
| 0.116 ct | 3.10-3.20 mm | 1/8 | +13/-13.5 |
| 0.13 ct | 3.20-3.30 mm | 1/8 | +13.5/-14 |
| 0.145 ct | 3.30-3.40 mm | 1/6 | +14/-14.5 |
| 0.155 ct | 3.40-3.50 mm | 1/6 | +14.5/-15 |
| 0.165 ct | 3.50-3.60 mm | 1/6 | +15/-15.5 |
| 0.19 ct | 3.60-3.70 mm | 1/5 | +15.5/-15.75 |
| 0.20 ct | 3.70-3.80 mm | 1/5 | +15.75/-16.5 |
What is the Ideal Table and Depth for the Brilliant Round Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 53% – 58% | 52% – 53% or 58% – 60% | 51% or 61% – 64% |
| Depth – % | 59% – 62.3% | 58% – 58.9% or 62.4% – 63.5% | 57.5% – 57.9% or 63.6% – 64.1% |
| Crown Angle | 34 – 34.9 | 32.1 – 33.9 or 35 – 35.9 | 30.1 – 32 or 36 – 37.9 |
| Pavilion Depth – % | 42.8% – 43.2% | 42% – 42.7% or 43.3% – 43.9% | 41% – 41.9% or 44% – 45.5% |
| Girdle | Thin to Sl. Thick | Very Thin to Sl. Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT / VERY GOOD | GOOD | |
|---|---|---|
| Length To Width Ratio | 0.99 – 1.01 | 0.98 – 1.01 |
Professional Princess Diamond Size Chart
Detailed Carat to MM / MM to Carat Princess Cut Diamond Size Chart
Princess Cut Diamond MM Size Chart / CT Conversion Chart
| PRINCESS CARAT WEIGHT | PRINCESS CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.11 ct. | 2.50 – 2.60 mm. |
| 0.12 – 0.13 ct. | 2.70 – 2.80 mm. |
| 0.14 – 0.17 ct. | 2.90 – 3.00 mm. |
| 0.18 – 0.21 ct. | 3.10 – 3.20 mm. |
| 0.22 – 0.24 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.28 ct. | 3.50 – 3.60 mm. |
| 0.30 – 0.35 ct. | 3.70 – 3.80 mm. |
| 0.35 – 0.40 ct. | 3.90 – 4.00 mm. |
| 0.40 – 0.45 ct. | 4.10 – 4.20 mm. |
| 0.45 – 0.50 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.00 mm. |
| PRINCESS CARAT WEIGHT | PRINCESS CUT MM SIZE |
|---|---|
| 0.80 – 0.89 ct. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.30 – 5.50 mm. |
| 1.00 – 1.15 ct. | 5.40 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.40 – 5.90 mm. |
| 1.30 – 1.45 ct. | 5.80 – 6.40 mm. |
| 1.50 – 1.60 ct. | 6.00 – 6.70 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.80 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.20 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.10 mm. |
| 3.00 – 3.30 ct. | 7.70 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.20 – 8.60 mm. |
| 3.70 – 3.90 ct. | 8.30 – 8.70 mm. |
| 4.00 – 4.20 ct. | 8.40 – 9.10 mm. |
| 4.40 – 4.70 ct. | 9.00 – 9.60 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Princess Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 67% – 72% | 59% – 66% or 73% – 75% | 59% – 66% or 73% – 75% |
| Depth – % | 64% | 75% | 58% or 75.1% – 80% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT / VERY GOOD | GOOD | |
|---|---|---|
| Length To Width Ratio | 1.00 – 1.03 | 1.04 – 1.05 |
Professional Square Cushion Cut Diamond Size Chart
Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool
Cushion Cut MM to Carat Diamond Conversion Charts for 0.04 – 0.69 cts
| CUSHION CARAT WEIGHT | CUSHION CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.11 ct. | 2.50 – 2.60 mm. |
| 0.12 – 0.13 ct. | 2.70 – 2.80 mm. |
| 0.14 – 0.17 ct. | 2.90 – 3.00 mm. |
| 0.18 – 0.21 ct. | 3.10 – 3.20 mm. |
| 0.22 – 0.24 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.28 ct. | 3.50 – 3.60 mm. |
| 0.30 – 0.35 ct. | 3.70 – 3.80 mm. |
| 0.35 – 0.40 ct. | 3.90 – 4.00 mm. |
| 0.40 – 0.45 ct. | 4.10 – 4.20 mm. |
| 0.45 – 0.50 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.00 mm. |
Cushion Cut MM to Carat Diamond Conversion Charts for 0.70 – 5.25 cts
| CUSHION CARAT WEIGHT | CUSHION CUT MM SIZE |
|---|---|
| 0.80 – 0.89 ct. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.30 – 5.50 mm. |
| 1.00 – 1.15 ct. | 5.40 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.40 – 5.90 mm. |
| 1.30 – 1.45 ct. | 5.80 – 6.40 mm. |
| 1.50 – 1.60 ct. | 6.00 – 6.70 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.80 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.20 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.10 mm. |
| 3.00 – 3.30 ct. | 7.70 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.20 – 8.60 mm. |
| 3.70 – 3.90 ct. | 8.30 – 8.70 mm. |
| 4.00 – 4.20 ct. | 8.40 – 9.10 mm. |
| 4.40 – 4.70 ct. | 9.00 – 9.60 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Princess Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 67% – 72% | 59% – 66% or 73% – 75% | 59% – 66% or 73% – 75% |
| Depth – % | 64% | 75% | 58% or 75.1% – 80% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT / VERY GOOD | GOOD | |
|---|---|---|
| Length To Width Ratio | 1.00 – 1.03 | 1.04 – 1.05 |
Rectangular Cushion Cut Diamond Size Chart
CT to MM / MM to CT Rectangular Cushion Cut Diamond Size Chart
Professional Rectangular Cushion Cut MM to CT Conversion Tool for 0.08 – 0.89 cts
| RECTANGULAR CUSHION CARAT WEIGHT | RECTANGULAR CUSHION MM LENGTH | RECTANGULAR CUSHION MM WIDTH |
|---|---|---|
| 0.08 – 0.11 ct. | 2.90 – 3.10 mm. | 2.30 – 2.40 mm. |
| 0.10 – 0.13 ct. | 3.20 – 3.40 mm. | 2.40 – 2.50 mm. |
| 0.12 – 0.15 ct. | 3.30 – 3.50 mm. | 2.40 – 2.60 mm. |
| 0.13 – 0.16 ct. | 3.50 – 3.60 mm. | 2.60 – 2.80 mm. |
| 0.16 – 0.19 ct. | 3.70 – 3.80 mm. | 2.90 – 3.10 mm. |
| 0.17 – 0.20 ct. | 3.90 – 4.00 mm. | 2.90 – 3.10 mm. |
| 0.21 – 0.22 ct. | 4.10 – 4.20 mm. | 3.10 – 3.20 mm. |
| 0.23 – 0.27 ct. | 4.30 – 4.40 mm. | 3.20 – 3.30 mm. |
| 0.28 – 0.36 ct. | 4.40 – 4.50 mm. | 3.30 – 3.50 mm. |
| 0.36 – 0.42 ct. | 4.70 – 4.80 mm. | 3.40 – 3.80 mm. |
| 0.43 – 0.48 ct. | 4.90 – 5.00 mm. | 3.60 – 3.90 mm. |
| 0.49 – 0.52 ct. | 5.00 – 5.20 mm. | 4.00 – 4.20 mm. |
| 0.52 – 0.55 ct. | 5.20 – 5.40 mm. | 4.00 – 4.20 mm. |
| 0.60 – 0.67 ct. | 5.40 – 5.60 mm. | 4.30 – 4.50 mm. |
| 0.70 – 0.75 ct. | 5.60 – 5.70 mm. | 4.50 – 4.60 mm. |
| 1.00 – 1.15 ct. | 6.50 – 6.80 mm. | 4.90 – 5.10 mm. |
| 1.20 – 1.27 ct. | 6.80 – 7.30 mm. | 5.40 – 5.70 mm. |
Professional Rectangular Cushion Cut MM to CT Conversion Tool for 0.90 – 5.25 cts
| RECTANGULAR CUSHION CARAT WEIGHT | RECTANGULAR CUSHION MM LENGTH | RECTANGULAR CUSHION MM WIDTH |
|---|---|---|
| 0.90 – 0.98 ct. | 6.10 – 6.40 mm. | 4.70 – 4.90 mm. |
| 1.00 – 1.15 ct. | 6.50 – 6.80 mm. | 4.90 – 5.10 mm. |
| 1.20 – 1.27 ct. | 6.80 – 7.30 mm. | 5.40 – 5.70 mm. |
| 1.30 – 1.45 ct. | 7.00 – 7.40 mm. | 5.80 – 5.90 mm. |
| 1.50 – 1.60 ct. | 7.30 – 7.90 mm. | 5.80 – 6.20 mm. |
| 1.65 – 1.80 ct. | 7.50 – 8.10 mm. | 6.10 – 6.50 mm. |
| 2.00 – 2.30 ct. | 8.00 – 8.60 mm. | 6.40 – 6.80 mm. |
| 2.40 – 2.60 ct. | 8.50 – 9.00 mm. | 6.90 – 7.20 mm. |
| 2.70 – 2.90 ct. | 8.90 – 9.40 mm. | 7.10 – 7.30 mm. |
| 3.00 – 3.30 ct. | 9.20 – 9.80 mm. | 7.30 – 7.70 mm. |
| 3.40 – 3.60 ct. | 9.40 – 10.00 mm. | 7.60 – 7.90 mm. |
| 3.70 – 3.90 ct. | 9.90 – 11.00 mm. | 8.00 – 8.40 mm. |
| 4.00 – 4.20 ct. | 10.00 – 11.00 mm. | 8.10 – 8.50 mm. |
| 4.40 – 4.70 ct. | 10.70 – 11.50 mm. | 8.40 – 8.70 mm. |
| 5.00 – 5.25 ct. | 11.00 – 11.70 mm. | 8.70 – 9.10 mm. |
| 0.90 – 0.98 ct. | 6.10 – 6.40 mm. | 4.70 – 4.90 mm. |
What is the Recommended Diamond Depth and Table for the Rectangular Cushion Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% | 54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 59.9% or 70.1% – 74% | 54% – 56.9% or 74.1% – 78% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.20-1.30 | 1.15 – 1.25 or 1.29 – 1.35 | 1.10 – 1.15 or 1.36 – 1.40 |
Professional Oval Diamond Size Chart
Detailed Oval Cut Size Comparison From CT to MM / MM to CT by Gemologists
Oval Cut Diamond Conversion Tool From CT to MM / MM to CT for 0.04 – 1.15 cts.
| OVAL CUT CARAT WEIGHT | OVAL CUT LENGTH MM SIZE | OVAL CUT WIDTH MM SIZE |
|---|---|---|
| 0.04 – 0.07 ct | 2.50 – 3.40 mm. | 2.00 – 2.40 mm. |
| 0.08 – 0.12 ct | 3.40 – 4.80 mm. | 2.40 – 3.00 mm. |
| 0.13 – 0.17 ct | 3.90 – 4.40 mm. | 2.80 – 3.10 mm. |
| 0.18 – 0.22 ct | 4.10 – 4.60 mm. | 3.00 – 3.40 mm. |
| 0.23 – 0.28 ct | 4.50 – 5.10 mm. | 3.30 – 3.60 mm. |
| 0.30 – 0.37 ct | 4.90 – 5.60 mm. | 3.60 – 4.00 mm. |
| 0.40 – 0.48 ct | 5.60 – 6.00 mm. | 4.00 – 4.40 mm. |
| 0.50 – 0.58 ct | 5.90 – 6.30 mm. | 4.40 – 4.60 mm. |
| 0.60 – 0.69 ct | 6.30 – 6.70 mm. | 4.60 – 4.80 mm. |
| 0.70 – 0.78 ct | 6.60 – 6.80 mm. | 4.80 – 5.20 mm. |
| 0.80 – 0.88 ct | 6.90 – 7.30 mm. | 5.10 – 5.40 mm. |
| 0.90 – 0.98 ct | 7.20 – 7.80 mm. | 5.20 – 5.50 mm. |
| 1.00 – 1.15 ct | 7.90 – 8.20 mm. | 5.50 – 5.80 mm. |
Oval Cut Diamond Conversion Tool From CT to MM / MM to CT for 1.20 to 1.15
| OVAL CUT CARAT WEIGHT | OVAL CUT LENGTH MM SIZE | OVAL CUT WIDTH MM SIZE |
|---|---|---|
| 1.20 – 1.27 ct | 8.10 – 8.30 mm. | 6.00 – 6.10 mm. |
| 1.30 – 1.45 ct | 8.40 – 8.50 mm. | 6.00 – 6.20 mm. |
| 1.50 – 1.60 ct | 8.50 – 8.80 mm. | 6.20 – 6.40 mm. |
| 1.65 – 1.80 ct | 8.90 – 9.60 mm. | 6.60 – 6.80 mm. |
| 2.00 – 2.30 ct | 9.80 – 10.10 mm. | 7.10 – 7.30 mm. |
| 2.40 – 2.60 ct | 10.30 – 10.70 mm. | 7.50 – 7.80 mm. |
| 2.70 – 2.90 ct | 10.70 – 11.00 mm. | 7.80 – 7.90 mm. |
| 3.00 – 3.30 ct | 10.90 – 11.60 mm. | 8.00 – 8.40 mm. |
| 3.40 – 3.60 ct | 11.50 – 12.00 mm. | 8.40 – 8.70 mm. |
| 3.70 – 3.90 ct | 12.00 – 12.35 mm. | 8.80 – 8.90 mm. |
| 4.00 – 4.20 ct | 12.25 – 12.50 mm. | 8.80 – 9.00 mm. |
| 4.40 – 4.70 ct | 12.40 – 13.00 mm. | 9.00 – 9.30 mm. |
| 5.00 – 5.25 ct | 13.00 – 13.60 mm. | 9.40 – 9.70 mm. |
What is the Ideal Diamond Depth and Table for the Oval Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 67% – 72% | 59% – 66% or 73% – 75% |
59% – 66% or 73% – 75% |
| Depth – % | 64% | 75% | 58% – 63.9% or 75.1% – 80% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 – 1.03 | 1.30 – 1.34 or 1.51 – 1.55 | 1.25 – 1.29 or 1.56 – 1.60 |
Professional Pear Shape Diamond Size Chart & Conversion Tool
Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT for 0.4 – 1.15 cts
| PEAR SHAPE CARAT WEIGHT | LENGTH MM SIZE | WIDTH MM SIZE |
|---|---|---|
| 0.04 – 0.07 ct. | 3.30 – 3.70 mm. | 2.00 – 2.40 mm. |
| 0.08 – 0.12 ct. | 3.60 – 4.20 mm. | 2.40 – 2.80 mm. |
| 0.13 – 0.17 ct. | 4.10 – 4.80 mm. | 2.90 – 3.20 mm. |
| 0.18 – 0.22 ct. | 4.70 – 5.20 mm. | 3.10 – 3.30 mm. |
| 0.23 – 0.28 ct. | 5.10 – 5.80 mm. | 3.40 – 3.70 mm. |
| 0.30 – 0.37 ct. | 5.70 – 6.10 mm. | 3.60 – 4.00 mm. |
| 0.40 – 0.48 ct. | 6.10 – 6.60 mm. | 3.90 – 4.40 mm. |
| 0.50 – 0.59 ct. | 6.50 – 7.30 mm. | 4.30 – 4.60 mm. |
| 0.60 – 0.67 ct. | 6.80 – 7.40 mm. | 4.60 – 4.80 mm. |
| 0.70 – 0.78 ct. | 7.30 – 8.00 mm. | 4.80 – 5.00 mm. |
| 0.80 – 0.88 ct. | 8.00 – 8.40 mm. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 8.20 – 8.50 mm. | 5.30 – 5.50 mm. |
| 1.00 – 1.15 ct. | 8.40 – 8.90 mm. | 5.60 – 5.80 mm. |
Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT for 1.20 to 1.15
| PEAR SHAPE CARAT WEIGHT | LENGTH MM SIZE | WIDTH MM SIZE |
|---|---|---|
| 1.20 – 1.27 ct | 9.00 – 9.50 mm. | 5.90 – 6.00 mm. |
| 1.30 – 1.45 ct | 9.30 – 9.60 mm. | 6.10 – 6.20 mm. |
| 1.50 – 1.60 ct | 9.70 – 10.20 mm. | 6.30 – 6.50 mm. |
| 1.65 – 1.80 ct | 10.00 – 10.50 mm. | 6.50 – 6.70 mm. |
| 2.00 – 2.30 ct | 10.70 – 11.50 mm. | 7.00 – 7.30 mm. |
| 2.40 – 2.60 ct | 11.50 – 11.80 mm. | 7.40 – 7.70 mm. |
| 2.70 – 2.90 ct | 11.70 – 12.30 mm. | 7.70 – 7.80 mm. |
| 3.00 – 3.30 ct | 12.40 – 13.00 mm. | 8.00 – 8.20 mm. |
| 3.40 – 3.60 ct | 12.70 – 13.40 mm. | 8.30 – 8.50 mm. |
| 3.70 – 3.90 ct | 13.30 – 13.70 mm. | 8.50 – 8.70 mm. |
| 4.00 – 4.20 ct | 13.60 – 14.00 mm. | 8.70 – 8.90 mm. |
| 4.40 – 4.70 ct | 14.00 – 14.30 mm. | 9.00 – 9.20 mm. |
| 5.00 – 5.25 ct | 14.50 – 15.50 mm. | 9.30 – 9.70 mm. |
What is the Ideal Diamond Depth and Table for the Pear Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 53% – 63% | 52% – 64% or 64% – 65% | 51% or 66% – 68% |
| Depth – % | 58% – 62% | 56% – 57.9% or 62.1% – 66% | 53% – 55.9% or 66.1% – 71% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Pear Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.45 – 1.55 | 1.40 – 1.45 or 1.56 – 1.65 | 1.35 – 1.39 or 1.66 – 1.80 |
Professional Emerald Cut Diamond Size Chart
Emerald Shaped Diamond Size Comparison From CT to MM / MM to CT
Emerald Cut Diamond Conversion Charts From CT to MM / MM to CT for 0.08 – 0.74 cts.
| EMERALD CUT CARAT WEIGHT | EMERALD CUT LENGTH MM SIZE | EMERALD CUT WIDTH MM SIZE |
|---|---|---|
| 0.08 – 0.11 ct. | 2.90 – 3.20 mm. | 2.10 – 2.30 mm. |
| 0.12 – 0.14 ct. | 3.20 – 3.40 mm. | 2.30 – 2.50 mm. |
| 0.13 – 0.15 ct. | 3.30 – 3.50 mm. | 2.30 – 2.70 mm. |
| 0.14 – 0.16 ct. | 3.50 – 3.60 mm. | 2.60 – 2.80 mm. |
| 0.16 – 0.17 ct. | 3.70 – 3.80 mm. | 2.70 – 2.80 mm. |
| 0.18 – 0.21 ct. | 3.90 – 4.00 mm. | 2.70 – 2.90 mm. |
| 0.22 – 0.24 ct. | 4.10 – 4.20 mm. | 2.90 – 3.10 mm. |
| 0.25 – 0.28 ct. | 4.30 – 4.40 mm. | 3.10 – 3.30 mm. |
| 0.30 – 0.34 ct. | 4.50 – 4.60 mm. | 3.20 – 3.40 mm. |
| 0.35 – 0.38 ct. | 4.70 – 4.80 mm. | 3.40 – 3.50 mm. |
| 0.40 – 0.44 ct. | 4.90 – 5.00 mm. | 3.50 – 3.60 mm. |
| 0.45 – 0.48 ct. | 5.00 – 5.20 mm. | 3.60 – 3.80 mm. |
| 0.50 – 0.53 ct. | 5.20 – 5.50 mm. | 3.80 – 4.00 mm. |
| 0.54 – 0.57 ct. | 5.50 – 5.70 mm. | 4.00 – 4.20 mm. |
| 0.60 – 0.68 ct. | 5.70 – 5.80 mm. | 4.00 – 4.30 mm. |
| 1.20 – 1.27 ct. | 7.00 – 7.40 mm. | 5.10 – 5.30 mm. |
| 1.30 – 1.45 ct. | 7.20 – 7.60 mm. | 5.20 – 5.50 mm. |
| EMERALD CUT CARAT WEIGHT | EMERALD CUT LENGTH MM SIZE | EMERALD CUT WIDTH MM SIZE |
|---|---|---|
| 0.74 – 0.78 ct. | 6.10 – 6.20 mm. | 4.40 – 4.50 mm. |
| 0.80 – 0.88 ct. | 6.30 – 6.50 mm. | 4.40 – 4.70 mm. |
| 0.90 – 0.98 ct. | 6.50 – 6.70 mm. | 4.60 – 4.90 mm. |
| 1.00 – 1.15 ct. | 6.80 – 7.00 mm. | 4.80 – 5.20 mm. |
| 1.20 – 1.27 ct. | 7.00 – 7.40 mm. | 5.10 – 5.30 mm. |
| 1.30 – 1.45 ct. | 7.20 – 7.60 mm. | 5.20 – 5.50 mm. |
| 1.50 – 1.60 ct. | 7.50 – 7.80 mm. | 5.40 – 5.60 mm. |
| 1.65 – 1.80 ct. | 7.70 – 8.20 mm. | 5.60 – 5.80 mm. |
| 2.00 – 2.30 ct. | 8.10 – 8.80 mm. | 6.00 – 6.40 mm. |
| 2.40 – 2.60 ct. | 8.80 – 9.40 mm. | 6.40 – 6.70 mm. |
| 2.70 – 2.90 ct. | 9.10 – 9.60 mm. | 6.60 – 6.80 mm. |
| 3.00 – 3.30 ct. | 9.40 – 10.00 mm. | 6.70 – 7.30 mm. |
| 3.40 – 3.60 ct. | 9.70 – 10.40 mm. | 7.20 – 7.40 mm. |
| 3.70 – 3.90 ct. | 9.90 – 10.80 mm. | 7.30 – 7.50 mm. |
| 4.00 – 4.20 ct. | 10.30 – 10.80 mm. | 7.50 – 7.90 mm. |
| 4.40 – 4.70 ct. | 10.80 – 11.20 mm. | 7.90 – 8.10 mm. |
| 5.00 – 5.25 ct. | 11.20 – 11.80 mm. | 8.10 – 8.30 mm. |
What is the Ideal Diamond Depth and Table for the Emerald Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 61% or 68% – 72% | 59% – 66% or 73% – 75% |
| Depth – % | 60% – 67% | 58% – 61% or 67% – 70% | 54% – 57% or 73% – 74% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.35 – 1.50 | 1.30 – 1.40 or 1.50 – 1.60 | 1.25 – 1.26 or 1.59 – 1.70 |
Professional Asscher Cut Diamond Size Chart
Asscher Shaped Diamond Size Comparison From CT to MM and Vice Versa
Asscher Cut Diamond CT to MM / MM to CT Conversion Chart for 0.04 – 0.75 cts
| ASSCHER CUT CARAT WEIGHT | ASSCHER CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.11 ct. | 2.50 – 2.60 mm. |
| 0.12 – 0.13 ct. | 2.70 – 2.80 mm. |
| 0.14 – 0.17 ct. | 2.90 – 3.10 mm. |
| 0.18 – 0.21 ct. | 3.20 – 3.30 mm. |
| 0.22 – 0.24 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.28 ct. | 3.50 – 3.70 mm. |
| 0.30 – 0.35 ct. | 3.70 – 3.90 mm. |
| 0.35 – 0.40 ct. | 3.90 – 4.00 mm. |
| 0.40 – 0.45 ct. | 4.10 – 4.20 mm. |
| 0.45 – 0.50 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.20 mm. |
Asscher Cut Diamond CT to MM / MM to CT Conversion Chart for 0.80 – 5.25 cts
| ASSCHER CUT CARAT WEIGHT | ASSCHER CUT MM SIZE |
|---|---|
| 0.80 – 0.89 ct. | 5.20 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.30 – 5.40 mm. |
| 1.00 – 1.15 ct. | 5.50 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.70 – 6.20 mm. |
| 1.30 – 1.45 ct. | 6.10 – 6.50 mm. |
| 1.50 – 1.60 ct. | 6.20 – 6.60 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.90 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.40 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.20 mm. |
| 3.00 – 3.30 ct. | 7.80 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.30 – 8.70 mm. |
| 3.70 – 3.90 ct. | 8.50 – 8.90 mm. |
| 4.00 – 4.20 ct. | 8.70 – 9.20 mm. |
| 4.40 – 4.70 ct. | 9.10 – 9.70 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Asscher Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% | 54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 60.9% or 67.1% – 70% | 54% – 56.9% or 74.1% – 78% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the recommended Length to Width Ratio of an Asscher Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 | 1.03 | 1.04 – 1.05 |
Professional Square Radiant Cut Diamond Size Chart
Square Radiant Shaped Diamond Size Comparison Tool
Radiant Cut Diamond CT to MM / MM to CT Conversion Chart for 0.04 – 0.77 cts
| ROUND CUT CARAT WEIGHT | ROUND CUT MM SIZE |
|---|---|
| 0.04 – 0.05 ct. | 1.90 – 2.00 mm. |
| 0.05 – 0.06 ct. | 2.10 – 2.20 mm. |
| 0.07 – 0.08 ct. | 2.30 – 2.40 mm. |
| 0.09 – 0.10 ct. | 2.50 – 2.60 mm. |
| 0.10 – 0.12 ct. | 2.70 – 2.80 mm. |
| 0.13 – 0.15 ct. | 2.90 – 3.00 mm. |
| 0.16 – 0.18 ct. | 3.10 – 3.20 mm. |
| 0.20 – 0.22 ct. | 3.20 – 3.40 mm. |
| 0.23 – 0.26 ct. | 3.50 – 3.60 mm. |
| 0.28 – 0.31 ct. | 3.70 – 3.80 mm. |
| 0.32 – 0.35 ct. | 3.90 – 4.00 mm. |
| 0.38 – 0.40 ct. | 4.10 – 4.20 mm. |
| 0.43 – 0.47 ct. | 4.30 – 4.40 mm. |
| 0.50 – 0.55 ct. | 4.50 – 4.60 mm. |
| 0.55 – 0.58 ct. | 4.70 – 4.80 mm. |
| 0.60 – 0.68 ct. | 4.90 – 5.00 mm. |
| 0.70 – 0.77 ct. | 5.00 – 5.20 mm. |
| 0.80 – 5.25 cts | 6.00 – 11.20 mm |
Radiant Cut Diamond CT to MM / MM to CT Conversion Chart for0.80 – 5.25 cts
| SQUARE RADIANT CUT CARAT WEIGHT | SQUARE RADIANT CUT MM SIZE |
|---|---|
| 0.80 – 0.88 ct. | 5.10 – 5.30 mm. |
| 0.90 – 0.98 ct. | 5.20 – 5.40 mm. |
| 1.00 – 1.15 ct. | 5.50 – 5.60 mm. |
| 1.20 – 1.27 ct. | 5.70 – 6.20 mm. |
| 1.30 – 1.45 ct. | 6.10 – 6.50 mm. |
| 1.50 – 1.60 ct. | 6.20 – 6.60 mm. |
| 1.65 – 1.80 ct. | 6.50 – 7.00 mm. |
| 2.00 – 2.30 ct. | 6.90 – 7.50 mm. |
| 2.40 – 2.60 ct. | 7.40 – 7.90 mm. |
| 2.70 – 2.90 ct. | 7.50 – 8.20 mm. |
| 3.00 – 3.30 ct. | 7.80 – 8.50 mm. |
| 3.40 – 3.60 ct. | 8.30 – 8.70 mm. |
| 3.70 – 3.90 ct. | 8.50 – 8.90 mm. |
| 4.00 – 4.20 ct. | 8.70 – 9.20 mm. |
| 4.40 – 4.70 ct. | 9.10 – 9.70 mm. |
| 5.00 – 5.25 ct. | 9.20 – 10.00 mm. |
What is the Ideal Diamond Depth and Table for the Radiant Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% |
54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 60.9% or 67.1% – 70% |
57% – 58.9% or 70.1% – 74% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Ideal Length to Width Ratio of a Radiant Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.00 | 1.03 | 1.04 – 1.05 |
Professional Rectangular Radiant Cut Diamond Size Chart
Realistic Rectangular Radiant Shaped Diamond Size Comparison from CT TO MM / MM to CT
Rectangular Radiant Cut Diamond CT to MM / MM to CT for 0.09 – 0.98 cts
| RECTANGULAR RADIANT CUT CARAT WEIGHT | RECTANGULAR RADIANT CUT LENGTH MM SIZE | RECTANGULAR RADIANT CUT WIDTH MM SIZE |
|---|---|---|
| 0.09 – 0.11 ct. | 2.90 – 3.10 mm. | 2.30 – 2.40 mm. |
| 0.11 – 0.13 ct. | 3.20 – 3.40 mm. | 2.40 – 2.50 mm. |
| 0.13 – 0.15 ct. | 3.30 – 3.50 mm. | 2.40 – 2.60 mm. |
| 0.14 – 0.16 ct. | 3.50 – 3.60 mm. | 2.60 – 2.80 mm. |
| 0.18 – 0.20 ct. | 3.70 – 3.80 mm. | 2.90 – 3.10 mm. |
| 0.19 – 0.22 ct. | 3.90 – 4.00 mm. | 2.90 – 3.10 mm. |
| 0.23 – 0.24 ct. | 4.10 – 4.20 mm. | 3.10 – 3.20 mm. |
| 0.25 – 0.28 ct. | 4.30 – 4.40 mm. | 3.20 – 3.30 mm. |
| 0.30 – 0.36 ct. | 4.40 – 4.50 mm. | 3.30 – 3.50 mm. |
| 0.38 – 0.44 ct. | 4.70 – 4.80 mm. | 3.40 – 3.80 mm. |
| 0.43 – 0.48 ct. | 4.90 – 5.00 mm. | 3.60 – 3.90 mm. |
| 0.49 – 0.52 ct. | 5.00 – 5.20 mm. | 4.00 – 4.20 mm. |
| 0.52 – 0.55 ct. | 5.20 – 5.40 mm. | 4.00 – 4.20 mm. |
| 0.60 – 0.67 ct. | 5.40 – 5.60 mm. | 4.30 – 4.50 mm. |
| 0.70 – 0.75 ct. | 5.60 – 5.70 mm. | 4.50 – 4.60 mm. |
| 0.80 – 0.89 ct. | 5.70 – 6.00 mm. | 4.50 – 4.60 mm. |
| 0.90 – 0.98 ct. | 6.10 – 6.40 mm. | 4.70 – 4.90 mm. |
Rectangular Radiant Cut Diamond CT to MM / MM to CT for 0.09 – 0.98 cts
| RECTANGULAR RADIANT CUT CARAT WEIGHT | RECTANGULAR RADIANT CUT LENGTH MM SIZE | RECTANGULAR RADIANT CUT WIDTH MM SIZE |
|---|---|---|
| 1.00 – 1.15 ct | 6.50 – 6.80 mm. | 4.90 – 5.10 mm. |
| 1.20 – 1.27 ct | 6.80 – 7.30 mm. | 5.40 – 5.70 mm. |
| 1.30 – 1.45 ct | 7.00 – 7.40 mm. | 5.80 – 5.90 mm. |
| 1.50 – 1.60 ct | 7.30 – 7.90 mm. | 5.80 – 6.20 mm. |
| 1.65 – 1.80 ct | 7.50 – 8.10 mm. | 6.10 – 6.50 mm. |
| 2.00 – 2.30 ct | 8.00 – 8.60 mm. | 6.40 – 6.80 mm. |
| 2.40 – 2.60 ct | 8.50 – 9.00 mm. | 6.90 – 7.20 mm. |
| 2.70 – 2.90 ct | 8.90 – 9.40 mm. | 7.10 – 7.30 mm. |
| 3.00 – 3.30 ct | 9.20 – 9.80 mm. | 7.30 – 7.70 mm. |
| 3.40 – 3.60 ct | 9.40 – 10.00 mm. | 7.60 – 7.90 mm. |
| 3.70 – 3.90 ct | 9.90 – 11.00 mm. | 8.00 – 8.40 mm. |
| 4.00 – 4.20 ct | 10.00 – 11.00 mm. | 8.10 – 8.50 mm. |
| 4.40 – 4.70 ct | 10.70 – 11.50 mm. | 8.40 – 8.70 mm. |
| 5.00 – 5.25 ct | 11.00 – 11.70 mm. | 8.70 – 9.10 mm. |
What is the Ideal Diamond Depth and Table for the Rectangular Radiant Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% | 54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 59.9% or 70.1% – 74% | 54% – 56.9% or 74.1% – 78% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
Recommended Length to Width Ratio of Rectangular Radiant Shaped Diamonds?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.20-1.30 | 1.15 – 1.25 or 1.29 – 1.35 | 1.10 – 1.15 or 1.36 – 1.40 |
Professional Heart Diamond Size Chart & Conversion Tool
MM to CT / CT to MM Heart Shaped Diamond Size Comparison
How to Accurately Measure a Heart Shaped Diamond
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts for 0.18-5.20 cts (Excellent Cut)
| HEART SHAPE CARAT WEIGHT | HEART SHAPE MM SIZE (RATIO OF 0.95 – 1.02) EXCELLENT CUT |
|---|---|
| 0.18 – 0.21 ct. | 3.50 – 3.70 mm. |
| 0.23 – 0.26 ct. | 3.80 – 4.10 mm. |
| 0.27 – 0.29 ct. | 4.20 – 4.40 mm. |
| 0.30 – 0.38 ct. | 4.50 – 4.70 mm. |
| 0.40 – 0.45 ct. | 4.90 – 5.10 mm. |
| 0.50 – 0.57 ct. | 5.20 – 5.50 mm. |
| 0.60 – 0.65 ct. | 5.60 – 5.70 mm. |
| 0.70 – 0.75 ct. | 5.80 – 6.10 mm. |
| 0.80 – 0.85 ct. | 6.10 – 6.30 mm. |
| 0.90 – 0.95 ct. | 6.20 – 6.50 mm. |
| 1.00 – 1.10 ct. | 6.40 – 6.70 mm. |
| 1.20 – 1.30 ct. | 7.00 – 7.40 mm. |
| 1.50 – 1.60 ct. | 7.50 – 7.90 mm. |
| 1.70 – 1.80 ct. | 8.00 – 8.20 mm. |
| 2.00 – 2.20 ct. | 8.30 – 8.60 mm. |
| 2.40 – 2.60 ct. | 8.40 – 8.90 mm. |
| 2.70 – 2.85 ct. | 8.80 – 9.30 mm. |
| 3.00 – 3.20 ct. | 9.30 – 9.80 mm. |
| 3.40 – 3.60 ct. | 9.50 – 9.90 mm. |
| 4.00 – 4.20 ct. | 9.80 – 10.00 mm. |
| 4.40 – 4.60 ct. | 9.90 – 10.30 mm. |
| 5.00 – 5.20 ct. | 10.50 – 11.10 mm. |
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts for 0.17 – 2.20 cts (Good Cut)
| HEART SHAPE CARAT WEIGHT | HEART SHAPE MM SIZE (RATIO OF 0.90 – 1.05) VERY GOOD CUT |
|---|---|
| 0.17 – 0.21 ct. | 3.30 – 3.70 mm. |
| 0.23 – 0.26 ct. | 3.60 – 3.90 mm. |
| 0.27 – 0.29 ct. | 4.00 – 4.30 mm. |
| 0.30 – 0.38 ct. | 4.20 – 4.60 mm. |
| 0.40 – 0.45 ct. | 4.60 – 4.90 mm. |
| 0.50 – 0.57 ct. | 4.90 – 5.30 mm. |
| 0.60 – 0.65 ct. | 5.30 – 5.70 mm. |
| 0.70 – 0.75 ct. | 5.50 – 5.80 mm. |
| 0.80 – 0.85 ct. | 5.80 – 6.00 mm. |
| 0.90 – 0.95 ct. | 5.90 – 6.30 mm. |
| 1.00 – 1.10 ct. | 6.10 – 6.50 mm. |
| 1.20 – 1.30 ct. | 6.60 – 7.00 mm. |
| 1.50 – 1.60 ct. | 7.10 – 8.50 mm. |
| 1.70 – 1.80 ct. | 7.50 – 8.30 mm. |
| 2.00 – 2.20 ct. | 7.90 – 8.20 mm. |
| 2.40 – 2.60 ct. | 8.00 – 8.50 mm. |
| 2.70 – 2.85 ct. | 8.40 – 9.00 mm. |
| 3.00 – 3.20 ct. | 8.90 – 9.30 mm. |
| 3.40 – 3.60 ct. | 9.00 – 9.40 mm. |
| 4.00 – 4.20 ct. | 9.30 – 9.50 mm. |
| 4.40 – 4.60 ct. | 9.40 – 9.80 mm. |
| 5.00 – 5.20 ct. | 9.80 – 10.80 mm. |
Recommended Dpeth and Table for Heart Shapes
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 53% – 63% | 52% or 64% – 65% |
51% or 66% – 68% |
| Depth – % | 58% – 62% | 56% – 57.9% or 62.1% – 66% |
53% – 55.9% or 66.1% – 71% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Recommended Length to Width Ratio in Heart Cut Diamonds?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 0.95 – 1.02 | 0.89 – 0.94 or 1.03 – 1.05 | 0.83 – 0.87 or 1.06 – 1.10 |
Professional Marquise Diamond Size Chart
CT to MM / MM to CT Marquise Shaped Diamond Size Comparison Chart
Marquise Cut Diamond CT to MM / MM CT Conversion Shart for 0.04 – 1.10 cts
| MARQUISE CUT CARAT WEIGHT | MARQUISE CUT LENGTH MM SIZE | MARQUISE CUT WIDTH MM SIZE |
|---|---|---|
| 0.04 – 0.07 ct. | 3.80 – 4.30 mm. | 1.80 – 2.10 mm. |
| 0.08 – 0.12 ct. | 4.20 – 4.90 mm. | 2.20 – 2.60 mm. |
| 0.13 – 0.17 ct. | 4.90 – 5.70 mm. | 2.50 – 2.90 mm. |
| 0.18 – 0.22 ct. | 5.60 – 6.30 mm. | 2.90 – 3.30 mm. |
| 0.23 – 0.28 ct. | 6.00 – 6.70 mm. | 3.10 – 3.40 mm. |
| 0.30 – 0.37 ct. | 6.50 – 7.20 mm. | 3.40 – 3.70 mm. |
| 0.40 – 0.48 ct. | 7.10 – 7.80 mm. | 3.70 – 4.20 mm. |
| 0.50 – 0.59 ct. | 7.50 – 8.50 mm. | 4.00 – 4.30 mm. |
| 0.60 – 0.67 ct. | 8.50 – 8.90 mm. | 4.20 – 4.50 mm. |
| 0.70 – 0.78 ct. | 8.80 – 9.30 mm. | 4.40 – 4.70 mm. |
| 0.80 – 0.88 ct. | 9.30 – 9.80 mm. | 4.70 – 4.80 mm. |
| 0.90 – 0.98 ct. | 9.30 – 10.00 mm. | 4.80 – 5.10 mm. |
| 1.00 – 1.10 ct. | 9.80 – 11.00 mm. | 5.00 – 5.30 mm. |
Marquise Cut Diamond CT to MM / MM CT Conversion Shart for 0.04 – 1.10 cts
| MARQUISE CUT CARAT WEIGHT | MARQUISE CUT LENGTH MM SIZE | MARQUISE CUT WIDTH MM SIZE |
|---|---|---|
| 1.20 – 1.27 ct | 10.60 – 11.50 mm. | 5.30 – 5.50 mm. |
| 1.30 – 1.45 ct | 11.30 – 12.00 mm. | 5.60 – 5.70 mm. |
| 1.50 – 1.60 ct | 11.80 – 12.20 mm. | 5.80 – 6.00 mm. |
| 1.65 – 1.80 ct | 12.30 – 12.50 mm. | 6.00 – 6.20 mm. |
| 2.00 – 2.30 ct | 12.60 – 13.50 mm. | 6.30 – 6.50 mm. |
| 2.40 – 2.60 ct | 13.60 – 14.40 mm. | 6.60 – 7.00 mm. |
| 2.70 – 2.90 ct | 14.40 – 14.80 mm. | 7.00 – 7.40 mm. |
| 3.00 – 3.30 ct | 14.60 – 15.30 mm. | 7.50 – 7.70 mm. |
| 3.40 – 3.60 ct | 15.50 – 16.10 mm. | 7.70 – 7.90 mm. |
| 3.70 – 3.90 ct | 16.20 – 16.40 mm. | 8.00 – 8.20 mm. |
| 4.00 – 4.20 ct | 16.40 – 16.80 mm. | 8.20 – 8.40 mm. |
| 4.40 – 4.70 ct | 16.70 – 17.30 mm. | 8.30 – 8.50 mm. |
| 5.00 – 5.25 ct | 17.40 – 17.80 mm. | 8.60 – 9.20 mm. |
What is the Ideal Diamond Depth and Table for the Marquise Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table – % | 61% – 69% | 57% – 60% or 70% – 72% |
54% – 56% or 73% – 74% |
| Depth – % | 61% – 67% | 59% – 60.9% or 67.1% – 70% |
57% – 58.9% or 70.1% – 74% |
| Girdle | Very Thin to – | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the recommended Length to Width Ratio of Marquise Cut Diamond?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.85 – 2.00 | 1.75 – 1.84 or 2.01 – 2.15 | 1.65 – 1.74 or 2.16 – 2.30 |
Professional Baguette Diamond Size Chart
Baguette Shaped Diamond Size Comparison of CT to MM / MM to CT
Tapered Baguette MM Width
| MM Length | 1.20 1.30 | 1.40 1.50 | 1.60 1.70 | 1.80 1.90 | 2.00 2.10 | 2.20 2.30 | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
2.50 2.60 | 0.03 0.04 | 0.04 0.05 | 0.05 0.06 | 0.06 0.07 | 0.08 0.09 | 0.09 0.10 | 0.10 0.11 | 0.11 0.12 | 0.13 0.14 | 0.14 0.15 |
2.70 2.80 | 0.03 0.04 | 0.04 0.05 | 0.04 0.05 | 0.06 0.08 | 0.08 0.10 | 0.09 0.11 | 0.10 0.12 | 0.12 0.13 | 0.12 0.14 | 0.14 0.16 |
| 3.90 4.00 | 0.06 0.08 | 0.07 0.09 | 0.08 0.10 | 0.10 0.12 | 0.12 0.14 | 0.13 0.15 | 0.17 0.18 | 0.18 0.19 | 0.20 0.22 | 0.21 0.24 |
| 4.10 4.20 | 0.06 0.08 | 0.07 0.09 | 0.08 0.10 | 0.11 0.13 | 0.12 0.14 | 0.14 0.16 | 0.17 0.19 | 0.19 0.21 | 0.21 0.23 | 0.23 0.25 |
| 4.30 4.40 | 0.08 0.09 | 0.09 0.11 | 0.10 0.12 | 0.13 0.15 | 0.14 0.16 | 0.15 0.18 | 0.18 0.20 | 0.21 0.23 | 0.23 0.26 | 0.26 0.28 |
| 4.50 4.60 | 0.09 0.10 | 0.10 0.12 | 0.11 0.13 | 0.14 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.21 | 0.22 0.24 | 0.24 0.27 | 0.27 0.30 |
| 4.70 4.80 | 0.10 0.11 | 0.11 0.12 | 0.12 0.14 | 0.15 0.16 | 0.16 0.18 | 0.18 0.20 | 0.20 0.22 | 0.23 0.25 | 0.25 0.28 | 0.28 0.31 |
| 4.90 5.00 | 0.10 0.12 | 0.11 0.13 | 0.12 0.15 | 0.14 0.16 | 0.17 0.18 | 0.18 0.21 | 0.21 0.23 | 0.23 0.26 | 0.27 0.30 | 0.30 0.33 |
| 5.10 5.20 | 0.11 0.13 | 0.12 0.14 | 0.13 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.22 | 0.22 0.23 | 0.24 0.28 | 0.28 0.32 | 0.31 0.35 |
| 5.30 5.40 | 0.11 0.14 | 0.13 0.15 | 0.15 0.17 | 0.16 0.18 | 0.18 0.20 | 0.21 0.23 | 0.23 0.25 | 0.25 0.29 | 0.28 0.33 | 0.33 0.37 |
| 5.50 5.60 | 0.11 0.14 | 0.13 0.16 | 0.15 0.18 | 0.17 0.20 | 0.20 0.22 | 0.22 0.24 | 0.25 0.29 | 0.28 0.31 | 0.30 0.35 | 0.35 0.39 |
Professional Tapered Baguette Diamond Size Chart
Realistic CT to MM / MM to CT Tapered Baguette Size Comparison
Tapered Baguette MM Width
| MM Length | 1.20 1.30 | 1.40 1.50 | 1.60 1.70 | 1.80 1.90 | 2.00 2.10 | 2.20 2.30 | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
| 2.50 2.60 | 0.02 0.03 | 0.03 0.04 | 0.04 0.05 | 0.05 0.06 | 0.07 0.07 | 0.07 0.08 | 0.08 0.09 | 0.09 0.10 | 0.11 0.11 | 0.11 0.12 |
| 2.70 2.80 | 0.02 0.03 | 0.03 0.04 | 0.04 0.05 | 0.05 0.07 | 0.07 0.08 | 0.08 0.09 | 0.08 0.10 | 0.10 0.11 | 0.10 0.11 | 0.11 0.13 |
| 2.90 3.00 | 0.03 0.04 | 0.04 0.06 | 0.05 0.06 | 0.06 0.07 | 0.07 0.09 | 0.09 0.10 | 0.09 0.11 | 0.11 0.11 | 0.11 0.13 | 0.11 0.13 |
| 3.10 3.20 | 0.03 0.05 | 0.04 0.06 | 0.05 0.06 | 0.06 0.07 | 0.07 0.09 | 0.09 0.11 | 0.10 0.11 | 0.11 0.12 | 0.12 0.14 | 0.12 0.14 |
| 3.30 3.40 | 0.04 0.06 | 0.05 0.07 | 0.06 0.07 | 0.07 0.07 | 0.07 0.09 | 0.08 0.10 | 0.11 0.11 | 0.11 0.13 | 0.13 0.14 | 0.13 0.15 |
| 3.50 3.60 | 0.05 0.06 | 0.06 0.07 | 0.07 0.07 | 0.07 0.08 | 0.08 0.09 | 0.09 0.10 | 0.11 0.12 | 0.12 0.14 | 0.12 0.15 | 0.14 0.15 |
| 3.70 3.80 | 0.05 0.06 | 0.06 0.07 | 0.07 0.07 | 0.08 0.09 | 0.08 0.10 | 0.10 0.11 | 0.12 0.13 | 0.14 0.15 | 0.15 0.16 | 0.16 0.18 |
| 3.90 | 0.05 0.07 | 0.06 0.07 | 0.07 0.08 | 0.08 | 0.10 | 0.11 | 0.14 | 0.15 | 0.16 | 0.17 |
| 4.10 4.20 | 0.05 0.07 | 0.06 0.07 | 0.07 0.08 | 0.09 0.11 | 0.10 0.11 | 0.11 0.13 | 0.14 0.16 | 0.16 0.17 | 0.17 0.19 | 0.19 0.21 |
| 4.30 4.40 | 0.07 0.07 | 0.07 0.09 | 0.08 0.10 | 0.11 0.12 | 0.11 0.13 | 0.12 0.15 | 0.15 0.16 | 0.17 0.19 | 0.19 0.21 | 0.21 0.23 |
| 4.50 4.60 | 0.07 0.08 | 0.08 0.10 | 0.09 0.11 | 0.11 0.12 | 0.12 0.14 | 0.14 0.16 | 0.16 0.17 | 0.18 0.20 | 0.20 0.22 | 0.22 0.25 |
| 4.70 4.80 | 0.08 0.09 | 0.09 0.10 | 0.10 0.11 | 0.12 0.13 | 0.13 0.15 | 0.15 0.16 | 0.16 0.18 | 0.19 0.21 | 0.21 0.23 | 0.23 0.25 |
| 4.90 5.00 | 0.08 0.10 | 0.09 0.11 | 0.10 0.12 | 0.11 0.13 | 0.14 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.21 | 0.22 0.25 | 0.25 0.27 |
| 5.10 5.20 | 0.09 0.11 | 0.10 0.11 | 0.11 0.12 | 0.12 0.14 | 0.14 0.16 | 0.16 0.18 | 0.18 0.19 | 0.20 0.23 | 0.23 0.26 | 0.25 0.29 |
| 5.30 5.40 | 0.09 0.11 | 0.11 0.12 | 0.12 0.14 | 0.13 0.15 | 0.15 0.16 | 0.17 0.19 | 0.19 0.21 | 0.21 0.24 | 0.23 0.27 | 0.27 0.30 |
| 5.50 5.60 | 0.09 0.11 | 0.11 0.13 | 0.12 0.15 | 0.14 0.16 | 0.16 0.18 | 0.18 0.20 | 0.21 0.24 | 0.23 0.25 | 0.25 0.29 | 0.29 0.32 |
Professional Carre Cut Diamond Size Chart
CT to MM and MM to Carat Carre Cut Size Comparison
Carre Cut Diamond Conversion Chart From CT to MM / MM to CT for 0.05 – 1.05 cts
| CARRE CUT CARAT WEIGHT | CARRE CUT MM SIZE |
|---|---|
| 0.05 – 0.06 ct. | 1.90 – 2.00 mm. |
| 0.06 – 0.07 ct. | 2.10 – 2.20 mm. |
| 0.08 – 0.09 ct. | 2.30 – 2.40 mm. |
| 0.10 – 0.12 ct. | 2.50 – 2.60 mm. |
| 0.13 – 0.14 ct. | 2.70 – 2.80 mm. |
| 0.15 – 0.17 ct. | 2.90 – 3.00 mm. |
| 0.18 – 0.21 ct. | 3.10 – 3.20 mm. |
| 0.22 – 0.25 ct. | 3.30 – 3.40 mm. |
| 0.25 – 0.29 ct. | 3.50 – 3.60 mm. |
| 0.30 – 0.36 ct. | 3.70 – 3.80 mm. |
| 0.37 – 0.42 ct. | 3.90 – 4.00 mm. |
| 0.42 – 0.47 ct. | 4.10 – 4.20 mm. |
| 0.47 – 0.53 ct. | 4.30 – 4.40 mm. |
| 0.55 – 0.60 ct. | 4.50 – 4.60 mm. |
| 0.60 – 0.65 ct. | 4.70 – 4.80 mm. |
| 0.70 – 0.75 ct. | 4.90 – 5.00 mm. |
| 0.80 – 0.85 ct. | 5.10 – 5.20 mm. |
| 0.90 – 1.05 ct. | 5.30 – 5.40 mm. |
| 1.00 – 1.05 ct. | 5.50 – 5.60 mm. |
Professional Trapezoid Cut Diamond Size Chart
CT TO MM / MM to CT Size Comparison Tool for Trapezoid Diamonds
Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.28 – 0.32 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. | 2.60 – 2.75 mm. |
| 0.31 – 0.35 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. | 2.60 – 2.75 mm. |
| 0.31 – 0.34 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. | 2.90 – 3.00 mm. |
| 0.38 – 0.44 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. | 2.90 – 3.00 mm. |
| 0.32 – 0.37 ct tw | 4.10 – 4.20 mm. | 2.70 – 2.80 mm. | 3.10 – 3.20 mm. |
| 0.40 – 0.44 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. | 3.20 – 3.45 mm. |
| 0.38 – 0.44 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. | 3.30 – 3.50 mm. |
| 0.43 – 0.47 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. | 3.30 – 3.50 mm. |
| 0.40 – 0.44 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. | 3.60 – 3.90 mm. |
| 0.44 – 0.47 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. | 3.60 – 3.90 mm. |
| 0.40 – 0.45 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. | 3.90 – 4.10 mm. |
| 0.50 – 0.55 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. | 3.90 – 4.10 mm. |
| 0.58 – 0.64 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. | 3.95 – 4.20 mm. |
| 0.55 – 0.64 ct tw | 5.40 – 5.60 mm. | 2.90 – 3.10 mm. | 4.30 – 4.50 mm. |
| 0.64 – 0.75 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. | 4.00 – 4.40 mm. |
| 0.58 – 0.75 ct tw | 5.90 – 6.20 mm. | 2.90 – 3.10 mm. | 4.70 – 5.00 mm. |
| 0.75 – 0.85 ct tw | 5.90 – 6.20 mm. | 3.30 – 3.50 mm. | 4.90 – 5.10 mm. |
| 0.80 – 1.00 ct tw | 5.90 – 6.20 mm. | 3.60 – 4.00 mm. | 4.50 – 4.80 mm. |
| 0.85 – 1.10 ct tw | 6.40 – 6.60 mm. | 3.80 – 4.20 mm. | 4.80 – 5.20 mm. |
| 0.97 – 1.20 ct tw | 6.40 – 6.60 mm. | 4.00 – 4.30 mm. | 4.80 – 5.20 mm. |
| 1.10 – 1.30 ct tw | 6.80 – 7.20 mm. | 4.00 – 4.30 mm. | 5.00 – 5.50 mm. |
Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.29 – 0.33 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. | 2.60 – 2.75 mm. |
| 0.32 – 0.36 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. | 2.60 – 2.75 mm. |
| 0.32 – 0.35 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. | 2.90 – 3.00 mm. |
| 0.39 – 0.45 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. | 2.90 – 3.00 mm. |
| 0.33 – 0.38 ct tw | 4.10 – 4.20 mm. | 2.70 – 2.80 mm. | 3.10 – 3.20 mm. |
| 0.41 – 0.46 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. | 3.20 – 3.45 mm. |
| 0.39 – 0.45 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. | 3.30 – 3.50 mm. |
| 0.44 – 0.48 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. | 3.30 – 3.50 mm. |
| 0.41 – 0.45 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. | 3.60 – 3.90 mm. |
| 0.45 – 0.49 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. | 3.60 – 3.90 mm. |
| 0.41 – 0.47 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. | 3.90 – 4.10 mm. |
| 0.51 – 0.57 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. | 3.90 – 4.10 mm. |
| 0.59 – 0.66 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. | 3.95 – 4.20 mm. |
| 0.57 – 0.67 ct tw | 5.40 – 5.60 mm. | 2.90 – 3.10 mm. | 4.30 – 4.50 mm. |
| 0.66 – 0.77 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. | 4.00 – 4.40 mm. |
| 0.60 – 0.78 ct tw | 5.90 – 6.20 mm. | 2.90 – 3.10 mm. | 4.70 – 5.00 mm. |
| 0.77 – 0.88 ct tw | 5.90 – 6.20 mm. | 3.30 – 3.50 mm. | 4.90 – 5.10 mm. |
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.29 – 0.33 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. | 2.60 – 2.75 mm |
| 0.32 – 0.36 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. | 2.60 – 2.75 mm |
| 0.32 – 0.35 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. | 2.90 – 3.00 mm |
| 0.39 – 0.45 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. | 2.90 – 3.00 mm |
| 0.33 – 0.38 ct tw | 4.10 – 4.20 mm. | 2.70 – 2.80 mm. | 3.10 – 3.20 mm |
| 0.41 – 0.46 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. | 3.20 – 3.45 mm |
| 0.39 – 0.45 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. | 3.30 – 3.50 mm |
| 0.44 – 0.48 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. | 3.30 – 3.50 mm |
| 0.41 – 0.45 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. | 3.60 – 3.90 mm |
| 0.45 – 0.49 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. | 3.60 – 3.90 mm |
| 0.41 – 0.47 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. | 3.90 – 4.10 mm |
| 0.51 – 0.57 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. | 3.90 – 4.10 mm |
| 0.59 – 0.66 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. | 3.95 – 4.20 mm |
| 0.57 – 0.67 ct tw | 5.40 – 5.60 mm. | 2.90 – 3.10 mm. | 4.30 – 4.50 mm |
| 0.66 – 0.77 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. | 4.00 – 4.40 mm |
| 0.60 – 0.78 ct tw | 5.90 – 6.20 mm. | 2.90 – 3.10 mm. | 4.70 – 5.00 mm |
| 0.77 – 0.88 ct tw | 5.90 – 6.20 mm. | 3.30 – 3.50 mm. | 4.90 – 5.10 mm |
| 0.80 – 1.10 ct tw | 5.90 – 6.20 mm. | 3.60 – 4.00 mm. | 4.50 – 4.80 mm. |
| 0.90 – 1.15 ct tw | 6.40 – 6.60 mm. | 3.80 – 4.20 mm. | 4.80 – 5.20 mm. |
| 1.00 – 1.25 ct tw | 6.40 – 6.60 mm. | 4.00 – 4.30 mm. | 4.80 – 5.20 mm. |
| 1.15 – 1.40 ct tw | 6.80 – 7.20 mm. | 4.00 – 4.30 mm. | 5.00 – 5.50 mm. |
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw
| PAIR AVERAGE TOTAL WEIGHT | TOP HORIZONTAL LENGTH MM SIZE – (L-1) | VERTICAL WIDTH MM SIZE – (W-1) | BOTTOM HORIZONTAL LENGTH MM SIZE – (L-2) |
|---|---|---|---|
| 0.22 – 0.26 ct tw | 3.70 – 4.00 mm. | 2.50 – 2.70 mm. | 1.70 – 1.80 mm. |
| 0.26 – 0.30 ct tw | 4.00 – 4.50 mm. | 2.70 – 3.00 mm. | 1.85 – 2.00 mm. |
| 0.30 – 0.34 ct tw | 4.20 – 4.60 mm. | 2.85 – 3.15 mm. | 1.90 – 2.10 mm. |
| 0.36 – 0.38 ct tw | 4.40 – 4.70 mm. | 3.00 – 3.20 mm. | 2.00 – 2.15 mm. |
| 0.38 – 0.42 ct tw | 4.70 – 4.90 mm. | 3.15 – 3.30 mm. | 2.15 – 2.25 mm. |
| 0.42 – 0.46 ct tw | 4.90 – 5.20 mm. | 3.30 – 3.50 mm. | 2.25 – 2.40 mm. |
| 0.48 – 0.50 ct tw | 5.20 – 5.50 mm. | 3.50 – 3.75 mm. | 2.40 – 2.50 mm. |
| 0.52 – 0.58 ct tw | 5.50 – 5.70 mm. | 3.75 – 3.85 mm. | 2.50 – 2.60 mm. |
| 0.62 – 0.66 ct tw | 5.60 – 5.90 mm. | 3.80 – 4.00 mm. | 2.60 – 2.70 mm. |
| 0.70 – 0.76 ct tw | 5.90 – 6.30 mm. | 4.00 – 4.25 mm. | 2.70 – 2.90 mm. |
| 0.78 – 0.80 ct tw | 6.20 – 6.50 mm. | 4.10 – 4.30 mm. | 2.85 – 3.00 mm. |
| 0.84 – 0.92 ct tw | 6.40 – 6.70 mm. | 4.15 – 4.40 mm. | 2.95 – 3.10 mm. |
| 0.96 – 1.02 ct tw | 6.60 – 6.80 mm. | 4.15 – 4.40 mm. | 3.00 – 3.15 mm. |
| 1.06 – 1.14 ct tw | 6.80 – 7.30 mm. | 4.25 – 4.60 mm. | 3.15 – 3.35 mm. |
| 1.24 – 1.38 ct tw | 7.20 – 7.50 mm. | 4.55 – 4.75 mm. | 3.30 – 3.45 mm. |
| 1.40 – 1.54 ct tw | 7.40 – 7.70 mm. | 4.70 – 4.85 mm. | 3.40 – 3.55 mm. |
| 1.58 – 1.72 ct tw | 7.60 – 8.10 mm. | 4.75 – 5.10 mm. | 3.50 – 3.70 mm. |
| 1.76 – 2.00 ct tw | 8.00 – 8.70 mm. | 5.00 – 5.50 mm. | 3.70 – 4.00 mm. |
| 2.10 – 2.60 ct tw | 8.40 – 9.40 mm. | 5.25 – 5.80 mm. | 3.90 – 4.30 mm. |
Professional Half Moon Cut Diamond Size Chart
MM to CT / CT TO MM Size Comparison Tool of Half Moon Shaped Diamonds
Half Moon Cut Diamond Conversion Charts From CT to MM / MM to CT for 0.25 – 1.30 ctw
| PAIR AVERAGE TOTAL WEIGHT | HALF MOON LENGTH MM SIZE | HALF MOON WIDTH MM SIZE |
|---|---|---|
| 0.25 – 0.27 ct tw | 3.60 – 3.80 mm. | 2.60 – 2.70 mm. |
| 0.28 – 0.32 ct tw | 3.60 – 3.80 mm. | 2.80 – 3.00 mm. |
| 0.30 – 0.35 ct tw | 3.90 – 4.10 mm. | 2.70 – 2.80 mm. |
| 0.36 – 0.38 ct tw | 3.90 – 4.10 mm. | 2.90 – 3.10 mm. |
| 0.30 – 0.33 ct tw | 4.20 – 4.30 mm. | 2.70 – 2.80 mm. |
| 0.36 – 0.40 ct tw | 4.20 – 4.30 mm. | 2.90 – 3.10 mm. |
| 0.36 – 0.39 ct tw | 4.40 – 4.50 mm. | 2.70 – 2.80 mm. |
| 0.42 – 0.45 ct tw | 4.40 – 4.50 mm. | 2.90 – 3.10 mm. |
| 0.38 – 0.43 ct tw | 4.60 – 4.80 mm. | 2.70 – 2.80 mm. |
| 0.43 – 0.46 ct tw | 4.60 – 4.80 mm. | 2.90 – 3.10 mm. |
| 0.39 – 0.44 ct tw | 4.90 – 5.20 mm. | 2.70 – 2.80 mm. |
| 0.46 – 0.50 ct tw | 4.90 – 5.20 mm. | 2.90 – 3.10 mm. |
| 0.53 – 0.57 ct tw | 4.90 – 5.20 mm. | 3.20 – 3.30 mm. |
| 0.56 – 0.61 ct tw | 5.40 – 5.60 mm. | 3.20 – 3.40 mm. |
| 0.70 – 0.80 ct tw | 5.90 – 6.20 mm. | 3.40 – 3.70 mm. |
| 0.90 – 1.00 ct tw | 5.90 – 6.20 mm. | 3.80 – 4.20 mm. |
| 0.95 – 1.20 ct tw | 6.40 – 6.60 mm. | 4.00 – 4.30 mm. |
| 1.10 – 1.30 ct tw | 6.80 – 7.20 mm. | 4.20 – 4.50 mm. |
Straight Bullet MM Width
| MM Length | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
|---|---|---|---|---|
| 3.90 4.00 | 0.15 0.16 | 0.16 0.17 | 0.18 0.19 | 0.18 0.21 |
| 4.10 4.20 | 0.15 0.17 | 0.17 0.18 | 0.18 0.20 | 0.20 0.22 |
| 4.30 4.40 | 0.16 0.18 | 0.18 0.20 | 0.20 0.23 | 0.23 0.25 |
| 4.50 4.60 | 0.17 0.18 | 0.19 0.21 | 0.21 0.24 | 0.24 0.26 |
| 4.70 4.80 | 0.18 0.19 | 0.20 0.22 | 0.22 0.25 | 0.25 0.27 |
| 4.90 5.00 | 0.18 0.20 | 0.20 0.23 | 0.24 0.26 | 0.26 0.29 |
| 5.10 5.20 | 0.19 0.20 | 0.21 0.25 | 0.25 0.28 | 0.27 0.31 |
| 5.30 5.40 | 0.20 0.22 | 0.22 0.26 | 0.25 0.29 | 0.29 0.33 |
| 5.50 5.60 | 0.22 0.26 | 0.25 0.27 | 0.26 0.31 | 0.31 0.34 |
Professional Tapered Bullet Cut Diamond Size Chart
Size Comparison Tool of Tapered Bullet Shaped Diamonds From CT to MM / MM to CT
Tapered Bullet MM Width
| MM Length | 2.40 2.50 | 2.60 2.70 | 2.80 2.90 | 3.00 3.10 |
|---|---|---|---|---|
| 3.90 4.00 | 0.12 0.13 | 0.13 0.13 | 0.14 0.15 | 0.15 0.17 |
| 4.10 4.20 | 0.12 0.13 | 0.13 0.15 | 0.15 0.16 | 0.16 0.18 |
| 4.30 4.40 | 0.13 0.14 | 0.15 0.16 | 0.16 0.18 | 0.18 0.20 |
| 4.50 4.60 | 0.13 0.15 | 0.15 0.17 | 0.17 0.19 | 0.19 0.21 |
| 4.70 4.80 | 0.14 0.15 | 0.16 0.18 | 0.18 0.20 | 0.20 0.22 |
| 4.90 5.00 | 0.15 0.16 | 0.16 0.18 | 0.19 0.21 | 0.21 0.23 |
| 5.10 5.20 | 0.15 0.16 | 0.17 0.20 | 0.20 0.22 | 0.22 0.25 |
| 5.30 5.40 | 0.20 0.22 | 0.18 0.20 | 0.20 0.23 | 0.23 0.26 |
| 5.50 5.60 | 0.18 0.20 | 0.20 0.22 | 0.21 0.25 | 0.25 0.27 |
Professional Shield Cut Diamond Size Chart
Size Comparison Tool for Shieldt Shaped Diamonds From CT to MM / MM to CT
Shield Cut Diamond Conversion Chart 0.13 – 1.45 ctw
| PAIR AVERAGE TOTAL WEIGHT | LENGTH MM SIZE | WIDTH MM SIZE |
|---|---|---|
| 0.13 – 0.17 ct tw | 3.60 – 4.10 mm. | 3.20 – 2.90 mm. |
| 0.18 – 0.22 ct tw | 4.20 – 4.40 mm. | 3.60 – 4.00 mm. |
| 0.23 – 0.27 ct tw | 4.30 – 5.10 mm. | 3.90 – 4.80 mm. |
| 0.28 – 0.37 ct tw | 4.80 – 5.60 mm. | 4.20 – 5.00 mm. |
| 0.38 – 0.47 ct tw | 5.20 – 5.80 mm. | 4.80 – 5.30 mm. |
| 0.48 – 0.59 ct tw | 5.40 – 6.00 mm. | 5.00 – 5.80 mm. |
| 0.60 – 0.68 ct tw | 5.80 – 6.30 mm. | 5.40 – 6.00 mm. |
| 0.70 – 0.78 ct tw | 6.20 – 6.80 mm. | 6.10 – 6.80 mm. |
| 0.80 – 0.89 ct tw | 6.70 – 7.40 mm. | 6.50 – 7.20 mm. |
| 0.90 – 0.98 ct tw | 7.20 – 7.80 mm. | 6.30 – 7.30 mm. |
| 1.00 – 1.10 ct tw | 7.60 – 8.50 mm. | 6.70 – 7.60 mm. |
| 1.18 – 1.45 ct tw | 8.00 – 8.90 mm. | 7.20 – 8.10 mm. |
Professional Trilliant Cut Diamond Size Chart
MM to CT / CT to MM Trilliant Shaped DIamond Size Comparison Tool
Trilliant Cut Diamond CT to MM / MM to CT Size Chart
Trillion Base to Point From CT to MM for 0.04 – 0.69 cts
| CARAT WEIGHT | BASE TO POINT MM SIZE |
|---|---|
| 0.03 – 0.04 ct. | 2.20 – 2.40 mm. |
| 0.05 – 0.06 ct. | 2.50 – 2.80 mm. |
| 0.07 – 0.08 ct. | 3.00 – 3.20 mm. |
| 0.08 – 0.11 ct. | 3.10 – 3.30 mm. |
| 0.13 – 0.15 ct. | 3.30 – 3.60 mm. |
| 0.15 – 0.17 ct. | 3.60 – 4.10 mm. |
| 0.17 – 0.19 ct. | 3.80 – 4.20 mm. |
| 0.20 – 0.21 ct. | 4.00 – 4.30 mm. |
| 0.22 – 0.24 ct. | 4.20 – 4.40 mm. |
| 0.24 – 0.26 ct. | 4.40 – 4.70 mm. |
| 0.27 – 0.28 ct. | 4.70 – 5.00 mm. |
| 0.30 – 0.33 ct. | 5.00 – 5.10 mm. |
| 0.35 – 0.38 ct. | 5.10 – 5.30 mm. |
| 0.40 – 0.43 ct. | 5.30 – 5.70 mm. |
| 0.44 – 0.46 ct. | 5.60 – 5.90 mm. |
| 0.48 – 0.52 ct. | 5.70 – 6.00 mm. |
| 0.55 – 0.58 ct. | 5.90 – 6.20 mm. |
| 0.60 – 0.65 ct. | 6.10 – 6.60 mm. |
| 0.70 – 0.78 ct. | 6.50 – 6.80 mm. |
| 0.80 – 0.87 ct. | 6.70 – 6.90 mm. |
| 0.90 – 0.98 ct. | 6.80 – 7.30 mm. |
| 1.00 – 1.15 ct. | 7.20 – 7.80 mm. |
| 1.18 – 1.45 ct. | 7.50 – 8.30 mm. |
Trillion Base to Point From CT to MM for 0.70 – 5.25 cts
| CARAT WEIGHT | POINT TO POINT MM SIZE |
|---|---|
| 0.03 – 0.04 ct. | 2.40 – 2.60 mm. |
| 0.05 – 0.06 ct. | 2.80 – 3.10 mm. |
| 0.07 – 0.08 ct. | 3.20 – 3.50 mm. |
| 0.08 – 0.11 ct. | 3.40 – 3.70 mm. |
| 0.13 – 0.15 ct. | 3.70 – 4.00 mm. |
| 0.15 – 0.17 ct. | 4.00 – 4.50 mm. |
| 0.17 – 0.19 ct. | 4.20 – 4.60 mm. |
| 0.20 – 0.21 ct. | 4.40 – 4.70 mm. |
| 0.22 – 0.24 ct. | 4.70 – 4.90 mm. |
| 0.24 – 0.26 ct. | 4.90 – 5.20 mm. |
| 0.27 – 0.28 ct. | 5.20 – 5.50 mm. |
| 0.30 – 0.33 ct. | 5.50 – 5.70 mm. |
| 0.35 – 0.38 ct. | 5.60 – 5.90 mm. |
| 0.40 – 0.43 ct. | 5.90 – 6.30 mm. |
| 0.44 – 0.46 ct. | 6.20 – 6.50 mm. |
| 0.48 – 0.52 ct. | 6.40 – 6.70 mm. |
| 0.55 – 0.58 ct. | 6.60 – 6.80 mm. |
| 0.60 – 0.65 ct. | 6.80 – 7.30 mm. |
| 0.70 – 0.78 ct. | 7.20 – 7.50 mm. |
| 0.80 – 0.87 ct. | 7.40 – 7.70 mm. |
| 0.90 – 0.98 ct. | 7.60 – 8.10 mm. |
| 1.00 – 1.15 ct. | 8.00 – 8.70 mm. |
| 1.18 – 1.45 ct. | 8.40 – 9.40 mm. |
Professional Size Conversion Chart for Calf Cut Diamonds
Calf Cut Diamond Conversion Chart – CT to MM / MM to CT
Cushion Cut MM to Carat Diamond Conversion Charts For 0.12 – 1.38 cts
| CARAT WEIGHT | TOP HORIZONTAL LENGTH MM SIZE | VERTICAL WIDTH MM SIZE |
|---|---|---|
| 0.12 – 0.14 ct. | 3.50 – 3.80 mm. | 3.20 – 3.40 mm. |
| 0.14 – 0.16 ct. | 3.80 – 4.30 mm. | 3.40 – 3.80 mm. |
| 0.16 – 0.18 ct. | 4.00 – 4.40 mm. | 3.60 – 3.90 mm. |
| 0.19 – 0.20 ct. | 4.20 – 4.50 mm. | 3.70 – 4.00 mm. |
| 0.21 – 0.23 ct. | 4.40 – 4.70 mm. | 4.00 – 4.20 mm. |
| 0.23 – 0.25 ct. | 4.60 – 5.00 mm. | 4.20 – 4.40 mm. |
| 0.26 – 0.27 ct. | 5.00 – 5.20 mm. | 4.40 – 4.70 mm. |
| 0.29 – 0.31 ct. | 5.20 – 5.40 mm. | 4.70 – 4.90 mm. |
| 0.33 – 0.36 ct. | 5.30 – 5.60 mm. | 4.80 – 5.00 mm. |
| 0.38 – 0.41 ct. | 5.60 – 6.00 mm. | 5.00 – 5.40 mm. |
| 0.42 – 0.44 ct. | 5.90 – 6.20 mm. | 5.30 – 5.50 mm. |
| 0.46 – 0.49 ct. | 6.10 – 6.30 mm. | 5.50 – 5.70 mm. |
| 0.52 – 0.55 ct. | 6.30 – 6.40 mm. | 5.70 – 5.80 mm. |
| 0.57 – 0.62 ct. | 6.40 – 6.90 mm. | 6.40 – 6.90 mm. |
| 0.67 – 0.74 ct. | 6.90 – 7.10 mm. | 6.80 – 7.10 mm. |
Professional Size Conversion Chart for Calf Cut Diamonds
Calf Cut Diamond Conversion Chart – CT to MM / MM to CT For 0.12 – 1.38 cts
| CARAT WEIGHT | TOP HORIZONTAL LENGTH MM SIZE | VERTICAL WIDTH MM SIZE |
|---|---|---|
| 0.12 – 0.14 ct. | 3.50 – 3.80 mm. | 3.20 – 3.40 mm. |
| 0.14 – 0.16 ct. | 3.80 – 4.30 mm. | 3.40 – 3.80 mm. |
| 0.16 – 0.18 ct. | 4.00 – 4.40 mm. | 3.60 – 3.90 mm. |
| 0.19 – 0.20 ct. | 4.20 – 4.50 mm. | 3.70 – 4.00 mm. |
| 0.21 – 0.23 ct. | 4.40 – 4.70 mm. | 4.00 – 4.20 mm. |
| 0.23 – 0.25 ct. | 4.60 – 5.00 mm. | 4.20 – 4.40 mm. |
| 0.26 – 0.27 ct. | 5.00 – 5.20 mm. | 4.40 – 4.70 mm. |
| 0.29 – 0.31 ct. | 5.20 – 5.40 mm. | 4.70 – 4.90 mm. |
| 0.33 – 0.36 ct. | 5.30 – 5.60 mm. | 4.80 – 5.00 mm. |
| 0.38 – 0.41 ct. | 5.60 – 6.00 mm. | 5.00 – 5.40 mm. |
| 0.42 – 0.44 ct. | 5.90 – 6.20 mm. | 5.30 – 5.50 mm. |
| 0.46 – 0.49 ct. | 6.10 – 6.30 mm. | 5.50 – 5.70 mm. |
| 0.52 – 0.55 ct. | 6.30 – 6.40 mm. | 5.70 – 5.80 mm. |
| 0.57 – 0.62 ct. | 6.40 – 6.90 mm. | 6.40 – 6.90 mm. |
| 0.67 – 0.74 ct. | 6.90 – 7.10 mm. | 6.80 – 7.10 mm. |
| 0.76 – 0.83 ct. | 7.00 – 7.30 mm. | 7.00 – 7.30 mm. |
| 0.86 – 0.93 ct. | 7.20 – 7.70 mm. | 7.20 – 7.70 mm. |
| 0.95 – 1.09 ct. | 7.60 – 8.20 mm. | 7.60 – 8.25 mm. |
| 1.12 – 1.38 ct. | 8.00 – 8.90 mm. | 8.00 – 8.90 mm. |
