Engagement Rings
Wedding Rings
Fine Jewelry
CUSTOM DESIGN
DiamondLab grown Diamond size chart
Lab Grown Diamond Size Chart
Select a shape to view size & carat data
Round
Emerald
Cushion
Princess
Oval
Marquise
Pear
Asscher
Radiant
Round Lab Grown Diamond Size Chart
Round lab diamonds are the most classic and popular diamond shape. They are most often used for engagement rings and offer maximum brilliance and sparkle.
| MM | Carat | MM | Carat |
|---|---|---|---|
| 0.8 | 0.0025 | 7 | 1.30 |
| 1 | 0.005 | 7.3 | 1.50 |
| 1.15 | 0.0067 | 7.5 | 1.67 |
| 1.12 | 0.0075 | 7.75 | 1.75 |
| 1.25 | 0.01 | 8 | 2.00 |
| 1.3 | 0.01 | 8.25 | 2.11 |
| 1.5 | 0.015 | 8.5 | 2.43 |
| 1.75 | 0.02 | 8.7 | 2.50 |
| 1.8 | 0.025 | 9 | 2.75 |
| 2 | 0.03 | 9.1 | 3.00 |
| 2.25 | 0.04 | 9.5 | 3.35 |
| 2.5 | 0.06 | 9.75 | 3.61 |
| 2.75 | 0.08 | 10 | 3.87 |
| 3 | 0.11 | 10.25 | 4.16 |
| 3.25 | 0.14 | 10.5 | 4.41 |
| 3.5 | 0.17 | 10.75 | 4.57 |
| 3.75 | 0.21 | 11 | 4.91 |
| 4 | 0.25 | 11.25 | 5.49 |
| 4.25 | 0.28 | 11.5 | 5.85 |
| 4.5 | 0.36 | 12 | 6.84 |
| 4.75 | 0.44 | 12.25 | 7.26 |
| 5 | 0.50 | 12.5 | 7.36 |
| 5.25 | 0.56 | 12.75 | 7.52 |
| 5.5 | 0.66 | 13 | 8.51 |
| 5.75 | 0.75 | 13.5 | 9.53 |
| 6 | 0.84 | 14 | 10.49 |
| 6.25 | 0.93 | 15 | 12.89 |
| 6.5 | 1.00 | 16 | 16.06 |
| 6.8 | 1.25 | 17 | 18.00 |
| MM | Carat | MM | Carat |
|---|---|---|---|
| 3x2 | 0.10 | 9x7 | 2.50 |
| 3.5x2 | 0.12 | 10x7.5 | 3.00 |
| 4x2 | 0.15 | 9.5x7.5 | 3.21 |
| 4x3 | 0.20 | 10x8 | 3.79 |
| 5x3 | 0.29 | 11x9 | 5.21 |
| 5.5x3.5 | 0.46 | 12x8 | 5.34 |
| 6x4 | 0.50 | 12x10 | 6.00 |
| 6.5x4 | 0.75 | 14x8 | 6.25 |
| 6.5x4.5 | 0.88 | 13x9 | 6.38 |
| 7x5 | 1.00 | 14x10 | 8.48 |
| 7.3x5.3 | 1.25 | 13x11 | 9.13 |
| 7.5x5.5 | 1.50 | 14x12 | 11.26 |
| 8x6 | 1.75 | 16x12 | 14.22 |
| 8.5x6.5 | 2.00 | 17x13 | 16.50 |
| MM | Carat |
|---|---|
| 4.2 | 0.40 |
| 4.9 | 0.50 |
| 5.25 | 0.75 |
| 5.5 | 1.00 |
| 6 | 1.25 |
| 6.5 | 1.50 |
| 7 | 2.00 |
| 7.5 | 2.50 |
| 8 | 3.00 |
| 8.5 | 3.50 |
| 9 | 4.12 |
| 9.5 | 5.09 |
| 10 | 5.62 |
| 11 | 7.44 |
| 12 | 9.52 |
| 13 | 12.66 |
| MM | Carat |
|---|---|
| 1.5 | 0.015 |
| 1.75 | 0.03 |
| 2 | 0.06 |
| 2.25 | 0.08 |
| 2.5 | 0.10 |
| 2.75 | 0.13 |
| 3 | 0.18 |
| 3.25 | 0.26 |
| 3.5 | 0.29 |
| 3.75 | 0.31 |
| 4 | 0.39 |
| 4.25 | 0.44 |
| 4.5 | 0.50 |
| 4.75 | 0.64 |
| 5 | 0.75 |
| 5.25 | 0.75 |
| 5.5 | 1.00 |
| 5.75 | 1.11 |
| 6 | 1.25 |
| 6.25 | 1.39 |
| 6.5 | 1.50 |
| 6.75 | 1.75 |
| 7 | 2.00 |
| MM | Carat | MM | Carat |
|---|---|---|---|
| 4.5x3.5 | 0.21 | 10x8 | 2.50 |
| 5x3 | 0.21 | 10.5x8.5 | 2.88 |
| 5.5x3.5 | 0.33 | 12x8 | 3.00 |
| 5x4 | 0.35 | 11x9 | 3.85 |
| 6x4 | 0.50 | 12x10 | 5.05 |
| 6x5 | 0.61 | 14x10 | 5.81 |
| 6.5x4.5 | 0.65 | 13x11 | 6.05 |
| 7x5 | 0.75 | 14x12 | 8.21 |
| 7.7x5.7 | 1.00 | 15x12 | 8.76 |
| 8x6 | 1.25 | 16x12 | 9.32 |
| 9x6 | 1.41 | 16x14 | 11.88 |
| 8.5x6.5 | 1.50 | 18x13 | 12.86 |
| 9x7 | 2.00 | 20x15 | 14.96 |
| MM | Carat | MM | Carat |
|---|---|---|---|
| 3x1.5 | 0.025 | 9.5x2 | 0.85 |
| 3.5x1.75 | 0.065 | 10.5 | 1.00 |
| 3.5x2 | 0.07 | 11x5.5 | 1.25 |
| 4x2 | 0.10 | 11.5x6 | 1.33 |
| 3.75x1.75 | 0.11 | 12x6 | 1.50 |
| 4.25x2.25 | 0.12 | 13x6.5 | 2.00 |
| 5x2.5 | 0.14 | 14x7 | 2.50 |
| 5.5x2.75 | 0.16 | 15x7 | 3.00 |
| 5.5x3 | 0.18 | 14x8 | 3.00 |
| 5x3 | 0.20 | 15x7.5 | 3.25 |
| 6.5x3 | 0.23 | 15x8 | 3.44 |
| 6x3 | 0.25 | 16x8 | 3.86 |
| 7x3 | 0.30 | 16.5x8.25 | 4.00 |
| 7.5x3.5 | 0.33 | 17x8.5 | 4.88 |
| 7x4 | 0.34 | 17.5x10 | 5.50 |
| 8x4 | 0.50 | 20x8 | 7.08 |
| 8.75x4.25 | 0.70 | 20x10 | 7.94 |
| 9x4.5 | 0.75 | 20x11 | 9.50 |
| MM | Carat | MM | Carat |
|---|---|---|---|
| 3x2 | 0.13 | 12x8 | 3.00 |
| 4x2.5 | 0.18 | 12x7 | 3.12 |
| 4x3 | 0.21 | 12x9 | 3.44 |
| 5x3 | 0.25 | 14x8 | 3.47 |
| 5x4 | 0.35 | 13x9 | 4.11 |
| 6x4 | 0.50 | 14x9 | 4.25 |
| 6.5x4.5 | 0.60 | 15x9 | 5.06 |
| 7x5 | 0.75 | 14x10 | 5.41 |
| 7.5x5.5 | 0.85 | 13x11 | 5.65 |
| 7.7x5.7 | 1.00 | 15x10 | 5.75 |
| 8x6 | 1.25 | 16x9 | 5.86 |
| 8.5x6.5 | 1.50 | 16x10 | 6.27 |
| 10x6 | 1.71 | 15x11 | 7.36 |
| 8.7x6.7 | 1.80 | 18x11 | 8.14 |
| 9x7 | 2.00 | 16x12 | 8.99 |
| 10x8 | 2.50 | 18x12 | 9.35 |
| 11x7.5 | 2.61 | 18x13 | 10.21 |
| 13x8 | 2.98 | 19x14 | 11.70 |
| 11x8 | 3.00 |
| MM | Carat | MM | Carat |
|---|---|---|---|
| 4 | 0.39 | 8 | 3.00 |
| 4.5 | 0.50 | 8.5 | 3.50 |
| 5 | 0.75 | 9 | 4.12 |
| 5.5 | 1.00 | 9.5 | 5.09 |
| 6 | 1.25 | 10 | 5.62 |
| 6.5 | 1.50 | 11 | 7.44 |
| 7 | 2.00 | 12 | 9.52 |
| 7.5 | 2.50 | 13 | 12.66 |
| MM | Carat | MM | Carat |
|---|---|---|---|
| 5x3 | 0.31 | 10x8 | 3.50 |
| 4.5x3.5 | 0.34 | 11x9 | 5.05 |
| 6x3 | 0.41 | 12x9 | 6.06 |
| 6x4 | 0.50 | 11.5x10 | 6.45 |
| 6.5x4.5 | 0.75 | 13x9 | 6.54 |
| 7x5 | 1.00 | 12x10 | 6.79 |
| 7.3x5.5 | 1.25 | 14x10 | 8.47 |
| 7.5x5.8 | 1.50 | 13x11 | 9.33 |
| 8x6 | 2.00 | 13.5x11.5 | 10.19 |
| 8.5x6.5 | 2.25 | 15x11 | 11.48 |
| 9x7 | 2.50 | 14x12 | 12.14 |
| 9.5x7.5 | 3.00 | 16x12 | 14.22 |
| 10x7 | 3.31 | 17x13 | 16.22 |
