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Round Diamond Size Chart
Round Diamond Size Chart
Size (Sieve) |
Diameter Size (Millimeter) |
Size (Carats) |
Number of Diamonds per Carat |
-00000 | 0.60 mm | 0.002 ct | 630 |
-0000+00000 | 0.70 mm | 0.0025 ct | 430 |
-000+0000 | 0.80 mm | 0.003 ct | 330 |
-00+000 | 0.90 mm | 0.004 ct | 275 |
-0+00 | 1.00 mm | 0.005 ct | 200 |
-1+0 | 1.10 mm | 0.006 ct | 167 |
-2+1 | 1.15 mm | 0.007 ct | 143 |
-2½+2 | 1.20 mm | 0.008 ct | 125 |
-2¾+2½ | 1.25 mm | 0.009 ct | 110 |
-3+2¾ | 1.30 mm | 0.01 ct | 100 |
-3½+3 | 1.35 mm | 0.011 ct | 90 |
-4+3½ | 1.40 mm | 0.0125 ct | 80 |
-4½+4 | 1.45 mm | 0.014 ct | 70 |
-5+4½ | 1.50 mm | 0.016 ct | 62 |
-5½+5 | 1.55 mm | 0.02 ct | 50 |
-6+5½ | 1.60 mm | 0.021 ct | 48 |
-6½+6 | 1.70 mm | 0.022 ct | 45 |
-7+6½ | 1.80 mm | 0.028 ct | 35 |
-7½+7 | 1.90 mm | 0.03 ct | 33 |
-8+7½ | 2.00 mm | 0.035 ct | 30 |
-8½+8 | 2.10 mm | 0.04 ct | 25 |
-9+8½ | 2.20 mm | 0.045 ct | 22 |
-9½+9 | 2.30 mm | 0.05 ct | 20 |
-10+9½ | 2.40 mm | 0.055 ct | 18 |
-10½+10 | 2.50 mm | 0.06 ct | 17 |
-11+10½ | 2.60 mm | 0.07 ct | 14 |
-11½+11 | 2.70 mm | 0.08 ct | 13 |
-12+11½ | 2.80 mm | 0.085 ct | 12 |
-12½+12 | 2.90 mm | 0.09 ct | 11 |
-13+12½ | 3.00 mm | 0.10 ct | 10 |
-13½+13 | 3.10 mm | 0.11 ct | 9 |
-14+13½ | 3.20 mm | 0.125 ct | 8 |
-14½+14 | 3.30 mm | 0.13 ct | 7.5 |
-15+14½ | 3.40 mm | 0.15 ct | 6.5 |
-15½+15 | 3.50 mm | 0.17 ct | 6 |
-16+15½ | 3.60 mm | 0.18 ct | 5.5 |
-16½+16 | 3.70 mm | 0.19 ct | 5.25 |
-17+16½ | 3.80 mm | 0.21 ct | 4.8 |
-17½+17 | 3.90 mm | 0.22 ct | 4.5 |
-18+17½ | 4.00 mm | 0.23 ct | 4.25 |
-18½+18 | 4.10 mm | 0.25 ct | 4 |
-19+18½ | 4.20 mm | 0.27 ct | 3.73 |
-19½+19 | 4.30 mm | 0.30 ct | 3.33 |
-20+19½ | 4.40 mm | 0.33 ct | 3 |
| 4.50 mm | 0.36 ct | 2.78 |
| 4.75 mm | 0.44 ct | 2.27 |
| 5.00 mm | 0.50 ct | 2.00 |
| 5.25 mm | 0.56 ct | 1.79 |
| 5.50 mm | 0.66 ct | 1.52 |
| 5.80 mm | 0.75 ct | 1.33 |
| 6.00 mm | 0.84 ct | 1.19 |
| 6.25 mm | 0.93 ct | 1.08 |
| 6.50 mm | 1.00 ct | 1.00 |
| 6.75 mm | 1.10 ct | 0.90 |
| 7.00 mm | 1.30 ct | 0.77 |
| 7.30 mm | 1.50 ct | 0.67 |
| 7.50 mm | 1.67 ct | 0.60 |
| 7.75 mm | 1.75 ct | 0.57 |
| 8.00 mm | 2.00 ct | 0.50 |
| 8.75 mm | 2.50 ct | 0.40 |
| 9.00 mm | 2.75 ct | 0.36 |
| 9.10 mm | 3.00 ct | 0.33 |
| 10.20 mm | 4.00 ct | 0.25 |
| 10.75 mm | 4.50 ct | 0.22 |
| 11.10 mm | 5.00 ct | 0.20 |
Round Diamond Size ChartRound Diamond Size Chart
Size (Sieve) |
Diameter Size (Millimeter) |
Size (Carats) |
Number of Diamonds per Carat |
-00000 | 0.60 mm | 0.002 ct | 630 |
-0000+00000 | 0.70 mm | 0.0025 ct | 430 |
-000+0000 | 0.80 mm | 0.003 ct | 330 |
-00+000 | 0.90 mm | 0.004 ct | 275 |
-0+00 | 1.00 mm | 0.005 ct | 200 |
-1+0 | 1.10 mm | 0.006 ct | 167 |
-2+1 | 1.15 mm | 0.007 ct | 143 |
-2½+2 | 1.20 mm | 0.008 ct | 125 |
-2¾+2½ | 1.25 mm | 0.009 ct | 110 |
-3+2¾ | 1.30 mm | 0.01 ct | 100 |
-3½+3 | 1.35 mm | 0.011 ct | 90 |
-4+3½ | 1.40 mm | 0.0125 ct | 80 |
-4½+4 | 1.45 mm | 0.014 ct | 70 |
-5+4½ | 1.50 mm | 0.016 ct | 62 |
-5½+5 | 1.55 mm | 0.02 ct | 50 |
-6+5½ | 1.60 mm | 0.021 ct | 48 |
-6½+6 | 1.70 mm | 0.022 ct | 45 |
-7+6½ | 1.80 mm | 0.028 ct | 35 |
-7½+7 | 1.90 mm | 0.03 ct | 33 |
-8+7½ | 2.00 mm | 0.035 ct | 30 |
-8½+8 | 2.10 mm | 0.04 ct | 25 |
-9+8½ | 2.20 mm | 0.045 ct | 22 |
-9½+9 | 2.30 mm | 0.05 ct | 20 |
-10+9½ | 2.40 mm | 0.055 ct | 18 |
-10½+10 | 2.50 mm | 0.06 ct | 17 |
-11+10½ | 2.60 mm | 0.07 ct | 14 |
-11½+11 | 2.70 mm | 0.08 ct | 13 |
-12+11½ | 2.80 mm | 0.085 ct | 12 |
-12½+12 | 2.90 mm | 0.09 ct | 11 |
-13+12½ | 3.00 mm | 0.10 ct | 10 |
-13½+13 | 3.10 mm | 0.11 ct | 9 |
-14+13½ | 3.20 mm | 0.125 ct | 8 |
-14½+14 | 3.30 mm | 0.13 ct | 7.5 |
-15+14½ | 3.40 mm | 0.15 ct | 6.5 |
-15½+15 | 3.50 mm | 0.17 ct | 6 |
-16+15½ | 3.60 mm | 0.18 ct | 5.5 |
-16½+16 | 3.70 mm | 0.19 ct | 5.25 |
-17+16½ | 3.80 mm | 0.21 ct | 4.8 |
-17½+17 | 3.90 mm | 0.22 ct | 4.5 |
-18+17½ | 4.00 mm | 0.23 ct | 4.25 |
-18½+18 | 4.10 mm | 0.25 ct | 4 |
-19+18½ | 4.20 mm | 0.27 ct | 3.73 |
-19½+19 | 4.30 mm | 0.30 ct | 3.33 |
-20+19½ | 4.40 mm | 0.33 ct | 3 |
| 4.50 mm | 0.36 ct | 2.78 |
| 4.75 mm | 0.44 ct | 2.27 |
| 5.00 mm | 0.50 ct | 2.00 |
| 5.25 mm | 0.56 ct | 1.79 |
| 5.50 mm | 0.66 ct | 1.52 |
| 5.80 mm | 0.75 ct | 1.33 |
| 6.00 mm | 0.84 ct | 1.19 |
| 6.25 mm | 0.93 ct | 1.08 |
| 6.50 mm | 1.00 ct | 1.00 |
| 6.75 mm | 1.10 ct | 0.90 |
| 7.00 mm | 1.30 ct | 0.77 |
| 7.30 mm | 1.50 ct | 0.67 |
| 7.50 mm | 1.67 ct | 0.60 |
| 7.75 mm | 1.75 ct | 0.57 |
| 8.00 mm | 2.00 ct | 0.50 |
| 8.75 mm | 2.50 ct | 0.40 |
| 9.00 mm | 2.75 ct | 0.36 |
| 9.10 mm | 3.00 ct | 0.33 |
| 10.20 mm | 4.00 ct | 0.25 |
| 10.75 mm | 4.50 ct | 0.22 |
| 11.10 mm | 5.00 ct | 0.20 |