Marquise Cut Diamond Size Chart (MM)
Marquise diamonds vary widely in terms of measurement proportions and carat weight. Use the chart below to obtain the average conversion expectations for a marquise cut diamond.
Marquise Diamond Sizes
| Marquise MM Size | Marquise Carat Weight |
|---|---|
| 3x1.5 mm. | 0.025 ct. |
| 3.5x1.75 mm. | 0.065 ct. |
| 3.5x2 mm. | 0.07 ct. |
| 4x2 mm. | 0.10 ct. |
| 3.75x1.75 mm. | 0.11 ct. |
| 4.25x2.25 mm. | 0.12 ct. |
| 5x2.5 mm. | 0.14 ct. |
| 5.5x2.75 mm. | 0.16 ct. |
| 5.5x3 mm. | 0.18 ct. |
| 5x3 mm. | 0.20 ct. |
| 6.5x3 mm. | 0.23 ct. |
| 6x3 mm. | 0.25 ct. |
| 7x3 mm. | 0.30 ct. |
| 7.5x3.5 mm. | 0.33 ct. |
| 7x4 mm. | 0.34 ct. |
| 8x4 mm. | 0.50 ct. |
| 8.75x4.25 mm. | 0.70 ct. |
| 9x4.5 mm. | 0.75 ct. |
| Marquise MM Size | Marquise Carat Weight |
|---|---|
| 9.5x4.7 mm. | 0.85 ct. |
| 10x5 mm. | 1.00 ct. |
| 11x5.5 mm. | 1.25 ct. |
| 11.5x6 mm. | 1.33 ct. |
| 12x6 mm. | 1.50 ct. |
| 13x6.5 mm. | 2.00 ct. |
| 14x7 mm. | 2.50 ct. |
| 15x7 mm. | 3.00 ct. |
| 14x8 mm. | 3.00 ct. |
| 15x7.5 mm. | 3.25 ct. |
| 15x8 mm. | 3.44 ct. |
| 16x8 mm. | 3.86 ct. |
| 16.5x8.25 mm. | 4.00 ct. |
| 17x8.5 mm. | 4.88 ct. |
| 17.5x10 mm. | 5.50 ct. |
| 20x8 mm. | 7.08 ct. |
| 20x10 mm. | 7.94 ct. |
| 20x11 mm. | 9.50 ct. |
Diamond Education
Understanding the 4 C's of a diamond (color, cut, carat, clarity) and the factors that impact its quality, price and value.