January 12th 2022
Marquise Cut Diamond Size Chart
By Devin Jones
See the average surface area and dimensions for marquise cut diamonds from 0.3 carats to 5 carats.
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MarquiseMarquise Cut Diamond Carat Size Chart
| Marquise Carat Weight | Marquise Surface Area (sq. mm) |
|---|---|
| 0.3 ct. | 11.71 |
| 0.4 ct. | 14.24 |
| 0.5 ct. | 16.56 |
| 0.6 ct. | 18.75 |
| 0.7 ct. | 20.82 |
| 0.8 ct. | 22.79 |
| 0.9 ct. | 24.69 |
| 1 ct. | 26.52 |
| 1.1 ct. | 28.29 |
| 1.2 ct. | 30.01 |
| 1.3 ct. | 31.69 |
| 1.4 ct. | 33.32 |
| 1.5 ct. | 34.92 |
| 1.6 ct. | 36.49 |
| 1.7 ct. | 38.02 |
| 1.8 ct. | 39.52 |
| 1.9 ct. | 41.00 |
| 2 ct. | 42.45 |
| 2.1 ct. | 43.88 |
| 2.2 ct. | 45.29 |
| 2.3 ct. | 46.68 |
| 2.4 ct. | 48.05 |
| 2.5 ct. | 49.40 |
| 2.6 ct. | 50.73 |
| 2.7 ct. | 52.05 |
| 2.8 ct. | 53.35 |
| 2.9 ct. | 54.64 |
| 3 ct. | 55.91 |
| 3.1 ct. | 57.17 |
| 3.2 ct. | 58.41 |
| 3.3 ct. | 59.65 |
| 3.4 ct. | 60.87 |
| 3.5 ct. | 62.08 |
| 3.6 ct. | 63.27 |
| 3.7 ct. | 64.46 |
| 3.8 ct. | 65.64 |
| 3.9 ct. | 66.81 |
| 4 ct. | 67.97 |
| 4.1 ct. | 69.12 |
| 4.2 ct. | 70.26 |
| 4.3 ct. | 71.39 |
| 4.4 ct. | 72.51 |
| 4.5 ct. | 73.62 |
| 4.6 ct. | 74.73 |
| 4.7 ct. | 75.83 |
| 4.8 ct. | 76.92 |
| 4.9 ct. | 78.01 |
| 5 ct. | 79.08 |
Marquise Carat Size vs. Surface Area
The above diamond size chart compares marquise cut diamonds of various carat weights (x-axis) to their corresponding surface areas (y-axis). While carat weight is typically thought of as the best indication of a diamond's size (meaning visual appearance), carat is actually a measure of weight. Diamonds of the same carat size can vary slightly in their visual appearance depending on how they are cut. For instance, a diamond with a deeper cut will appear smaller than a diamond of the same carat weight with a shallower cut.
For our marquise cut diamond analysis we averaged the diameters of hundreds of thousands to come up with a simple exponential function (shown on the chart below). Using this formula we can study the corresponding changes in diameter and surface area for a given change in carat weight. Interestingly, as the carat size increases we notice a significant slowing of the surface area. This is because carat weight scales as a measure of volume (mm cube) while surface area scales at a slower rate (mm squared).
