The shape library
Oval
Elongated, with a softer line.
Brilliant cut
Oval
Elongated, with a softer line.
An oval brings the light pattern of brilliant-style faceting to a continuous, elongated outline. Length-to-width proportions change its character considerably.
View oval size chart A closer look at ovalIllustrative faceted models, shown under consistent lighting. Actual stones, facet patterns and proportions vary.
A sense of scale
Oval
size chart.
All sizes, in two parts. Select any weight below to compare its approximate millimetre size.
The length-to-width ratio changes how slender an oval appears.
Understand carat and the 4Cs01 Small stones
0.02–0.20 ct
| Carat weight (ct) | Length × width (mm, approx.) |
|---|---|
| 2.3×1.4 † | |
| 2.7×1.6 † | |
| 2.9×1.8 † | |
| 3.1×1.9 † | |
| 3.3×2 † | |
| 3.5×2.1 † | |
| 3.7×2.2 † | |
| 3.8×2.3 † | |
| 4×2.4 † | |
| 4.2×2.5 † | |
| 4.5×2.7 † | |
| 4.8×2.9 † | |
| 5×3 |
02 Larger stones
0.25–5.00 ct
| Carat weight (ct) | Length × width (mm, approx.) |
|---|---|
| 5×3.5 | |
| 6.25×4.5 | |
| 7×5 | |
| 8×6 | |
| 9×6.5 | |
| 10×7 | |
| 11.5×8 | |
| 12.5×9 | |
| 13.6×10 |
† 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) · Thomas Laine size chartGIA carat education
Character & construction
Elongated, with a softer line.
An oval brings the light pattern of brilliant-style faceting to a continuous, elongated outline. Length-to-width proportions change its character considerably.
What to consider
View the stone in motion to assess the central bow-tie pattern, outline symmetry and how evenly brightness travels across it.
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