The shape library
Cushion
Soft corners. Individual character.
Modified brilliant
Cushion
Soft corners. Individual character.
Rounded corners soften a square or rectangular outline. Cushion cuts span many facet arrangements, so two stones of equal weight can look noticeably different.
View cushion size chart A closer look at cushionIllustrative faceted models, shown under consistent lighting. Actual stones, facet patterns and proportions vary.
A sense of scale
Cushion
size chart.
All sizes, in two parts. Select any weight below to compare its approximate millimetre size.
Square cushion examples. Elongated cushions and different facet patterns can have a different spread.
Understand carat and the 4Cs01 Small stones
0.02–0.20 ct
| Carat weight (ct) | Length × width (mm, approx.) |
|---|---|
| 1.5×1.5 † | |
| 1.7×1.7 † | |
| 1.9×1.9 † | |
| 2×2 † | |
| 2.2×2.2 † | |
| 2.3×2.3 † | |
| 2.4×2.4 † | |
| 2.5×2.5 † | |
| 2.6×2.6 † | |
| 2.7×2.7 † | |
| 2.9×2.9 † | |
| 3×3 | |
| 3.2×3.2 † | |
| 3.3×3.3 |
02 Larger stones
0.25–5.00 ct
| Carat weight (ct) | Length × width (mm, approx.) |
|---|---|
| 3.6×3.6 | |
| 4.5×4.5 | |
| 5.25×5.25 | |
| 5.6×5.6 | |
| 6.5×6.5 | |
| 7×7 | |
| 8.2×8.2 | |
| 8.7×8.7 | |
| 9.7×9.7 |
† Calculated estimate from nearby published sizes. Below the smallest reference, dimensions are scaled assuming unchanged proportions. These entries describe an illustrative size, not a measured stone.
Educational estimates. Carat measures weight: 1 ct = 0.2 g. Depth, girdle and proportions affect dimensions, so there is no exact mm-to-carat conversion. Check the individual stone’s measurements and grading report.
References: Stuller size chart (PDF)GIA carat education
Character & construction
Soft corners. Individual character.
Rounded corners soften a square or rectangular outline. Cushion cuts span many facet arrangements, so two stones of equal weight can look noticeably different.
What to consider
Compare the actual stone, including its outline and light pattern. The shape name alone does not describe the facet style.
Ask for the actual measurements, report and images of the stone being offered. A shape illustration cannot establish its appearance, grading or availability.
Read the shape alongside the 4CsContinue exploring
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