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Diamond Size Comparison
Compare the real size of a 1ct Round and a 1ct Heart, sized to scale on a ring and finger and calibrated to your screen. Adjust either stone below to explore other combinations.
Stone A
Stone B
Overall, 1ct Round is 2% larger than 1ct Heart when looked at from above.


1ct Round


1ct Heart
| Attribute | 1ct Round | 1ct Heart |
|---|---|---|
| Shape | Round | Heart |
| Weight | 1 ct | 1 ct |
| Measurements | 6.5×6.5×3.9 mm | 6.7×6.2×3.4 mm |
| Total depth % | 60% | 52.7% |
| Length / width ratio | 1 | 1.08 |
| Face-up area | 33.18 mm² | 32.63 mm² |
| Face-up area per carat | 33.18 mm²/ct | 32.63 mm²/ct |
| Approx. volume | 86.28 mm³ | 73.95 mm³ |
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1ct Round has approximately 2% more face-up area than 1ct Heart.
| Attribute | 1ct Round | 1ct Heart |
|---|---|---|
| Shape | Round | Heart |
| Weight | 1 ct | 1 ct |
| Measurements | 6.5×6.5×3.9 mm | 6.7×6.2×3.4 mm |
| Total depth % | 60% | 52.7% |
| Length / width ratio | 1 | 1.08 |
| Face-up area | 33.18 mm² | 32.63 mm² |
| Face-up area per carat | 33.18 mm²/ct | 32.63 mm²/ct |
| Approx. volume | 86.28 mm³ | 73.95 mm³ |
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