Rectangular Cushion Cut Diamond Size Chart
CT to MM / MM to CT Rectangular Cushion Cut Diamond Size Chart
Professional Rectangular Cushion Cut MM to CT Conversion Tool
The Rectangular, or Elongated Cushion Cut takes the tremendous benefits of the classic Square Cushion Cut, such as its elegance, soft rounded corners and tremendous sparkle, while adding longer coverage on the finger in engagement and wedding rings.
Below you will find an in-depth easy to use conversion tool for the Rectangular Cushion Cut Diamond From CT to MM, including pieces from 0.04 to 5.25 cts.
0.08 - 0.89 cts
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| RECTANGULAR CUSHION CARAT WEIGHT | RECTANGULAR CUSHION MM LENGTH | RECTANGULAR CUSHION MM WIDTH |
|---|---|---|
| 0.08 - 0.11 ct. | 2.90 - 3.10 mm. | 2.30 - 2.40 mm. |
| 0.10 - 0.13 ct. | 3.20 - 3.40 mm. | 2.40 - 2.50 mm. |
| 0.12 - 0.15 ct. | 3.30 - 3.50 mm. | 2.40 - 2.60 mm. |
| 0.13 - 0.16 ct. | 3.50 - 3.60 mm. | 2.60 - 2.80 mm. |
| 0.16 - 0.19 ct. | 3.70 - 3.80 mm. | 2.90 - 3.10 mm. |
| 0.17 - 0.20 ct. | 3.90 - 4.00 mm. | 2.90 - 3.10 mm. |
| 0.21 - 0.22 ct. | 4.10 - 4.20 mm. | 3.10 - 3.20 mm. |
| 0.23 - 0.27 ct. | 4.30 - 4.40 mm. | 3.20 - 3.30 mm. |
| 0.28 - 0.36 ct. | 4.40 - 4.50 mm. | 3.30 - 3.50 mm. |
| 0.36 - 0.42 ct. | 4.70 - 4.80 mm. | 3.40 - 3.80 mm. |
| 0.43 - 0.48 ct. | 4.90 - 5.00 mm. | 3.60 - 3.90 mm. |
| 0.49 - 0.52 ct. | 5.00 - 5.20 mm. | 4.00 - 4.20 mm. |
| 0.52 - 0.55 ct. | 5.20 - 5.40 mm. | 4.00 - 4.20 mm. |
| 0.60 - 0.67 ct. | 5.40 - 5.60 mm. | 4.30 - 4.50 mm. |
| 0.70 - 0.75 ct. | 5.60 - 5.70 mm. | 4.50 - 4.60 mm. |
| 0.80 - 0.89 ct. | 5.70 - 6.00 mm. | 4.50 - 4.60 mm. |
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0.90 - 5.25 cts
Copyright © AVA DIAMONDS
| RECTANGULAR CUSHION CARAT WEIGHT | RECTANGULAR CUSHION MM LENGTH | RECTANGULAR CUSHION MM WIDTH |
|---|---|---|
| 1.00 - 1.15 ct. | 6.50 - 6.80 mm. | 4.90 - 5.10 mm. |
| 1.20 - 1.27 ct | 6.80 - 7.30 mm. | 5.40 - 5.70 mm. |
| 1.30 - 1.45 ct | 7.00 - 7.40 mm. | 5.80 - 5.90 mm. |
| 1.50 - 1.60 ct | 7.30 - 7.90 mm. | 5.80 - 6.20 mm. |
| 1.65 - 1.80 ct | 7.50 - 8.10 mm. | 6.10 - 6.50 mm. |
| 2.00 - 2.30 ct | 8.00 - 8.60 mm. | 6.40 - 6.80 mm. |
| 2.40 - 2.60 ct | 8.50 - 9.00 mm. | 6.90 - 7.20 mm. |
| 2.70 - 2.90 ct | 8.90 - 9.40 mm. | 7.10 - 7.30 mm. |
| 3.00 - 3.30 ct | 9.20 - 9.80 mm. | 7.30 - 7.70 mm. |
| 3.40 - 3.60 ct | 9.40 - 10.00 mm. | 7.60 - 7.90 mm. |
| 3.70 -3.90 ct | 9.90 - 11.00 mm. | 8.00 - 8.40 mm. |
| 4.00 - 4.20 ct | 10.00 - 11.00 mm. | 8.10 - 8.50 mm. |
| 4.40 - 4.70 ct | 10.70 - 11.50 mm. | 8.40 - 8.70 mm. |
| 5.00 - 5.25 ct | 11.00- 11.70 mm. | 8.70 - 9.10 mm. |
| 0.90 - 0.98 ct. | 6.10 - 6.40 mm. | 4.70 - 4.90 mm. |
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What are the Ideal Proportions of a Rectangular Cushion Cut?
Much like its squared rendition, the Rectangular Cushion Cut Diamond requires some planning ahead in order to get the maximum return on your investment. The following guide should prove useful in gauging the ideal, or recommended proportions for elongated cushion shaped diamonds including depth and table, and ratios.
What is the Recommended Diamond Depth and Table for the Rectangular Cushion Cut?
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Table - % | 61 %- 69% | 57% - 60% or 70% - 72% | 54% - 56% or 73% - 74% |
| Depth - % | 61% - 67% | 59% - 59.9% or 70.1% - 74% | 54% - 56.9% or 74.1% - 78% |
| Girdle | Very Thin to | Slightly Thick | Very Thin to Thick |
| Culet | None | Very Small | Small |
What is the Recommended Rectangular Cushion Cut Diamond Length to Width Ratio?
The length to width ratio in Rectangular Cushion Shaped Diamonds is incredibly useful as a means to gauge pieces that are worth looking further into, and avoiding ones that aren’t. Of course, as useful as knowing the recommended ratio is, it works best when combined with good old fashioned eye test, that will never be obsolete.
| EXCELLENT | VERY GOOD | GOOD | |
|---|---|---|---|
| Length To Width Ratio | 1.20-1.30 | 1.15 - 1.25 or 1.29 - 1.35 | 1.10 - 1.15 or 1.36 - 1.40 |
