Wondering what a 1 carat Marquise diamond looks link on a hand? Our Marquise diamond size chart will help you convert millimeter (mm) size to carat size for Marquise cut diamonds.
Marquise Diamond Sizes
| Marquise MM Size |
Marquise Weight (ct) |
Black Diamond ct weight (Approx) |
|---|---|---|
| 3×1.5 mm. | 0.03 | 0.03 |
| 3.5×1.75 mm. | 0.07 | 0.08 |
| 3.5×2 mm. | 0.07 | 0.08 |
| 4×2 mm. | 0.10 | 0.12 |
| 3.75×1.75 mm. | 0.11 | 0.13 |
| 4.25×2.25 mm. | 0.12 | 0.14 |
| 5×2.5 mm. | 0.14 | 0.17 |
| 5.5×2.75 mm. | 0.16 | 0.19 |
| 5.5×3 mm. | 0.18 | 0.22 |
| 5×3 mm. | 0.20 | 0.24 |
| 6.5×3 mm. | 0.23 | 0.28 |
| 6×3 mm. | 0.25 | 0.30 |
| 7×3 mm. | 0.30 | 0.36 |
| 7.5×3.5 mm. | 0.33 | 0.40 |
| 7×4 mm. | 0.34 | 0.41 |
| 8×4 mm. | 0.50 | 0.65 |
| 8.75×4.25 mm. | 0.70 | 0.91 |
| 9×4.5 mm. | 0.75 | 1.00 |
| 9.5×4.7 mm. | 0.85 | 1.20 |
| Marquise MM Size |
Marquise Weight (ct) |
Black Diamond ct weight (Approx) |
|---|---|---|
| 10×5 mm. | 1.00 | 1.40 |
| 11×5.5 mm. | 1.25 | 1.80 |
| 11.5×6 mm. | 1.33 | 1.90 |
| 12×6 mm. | 1.50 | 2.10 |
| 13×6.5 mm. | 2.00 | 2.80 |
| 14×7 mm. | 2.50 | 3.50 |
| 15×7 mm. | 3.00 | 4.20 |
| 14×8 mm. | 3.00 | 4.20 |
| 15×7.5 mm. | 3.25 | 4.60 |
| 15×8 mm. | 3.44 | 4.90 |
| 16×8 mm. | 3.86 | 5.50 |
| 16.5×8.25 mm. | 4.00 | 5.60 |
| 17×8.5 mm. | 4.88 | 6.90 |
| 17.5×10 mm. | 5.50 | 7.70 |
| 20×8 mm. | 7.08 | 10.00 |
| 20×10 mm. | 7.94 | 11.20 |
| 20×11 mm. | 9.50 | 13.30 |
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