Here you’ll find a very basic conversion chart to help you visualize the actual size of the gemstone or ring you’re considering:
| Millimeters | Inches | Rounded to the Nearest 100th of an Inch |
|---|---|---|
| 3 mm | 0.1181102362206 | 0.12 |
| 4 mm | 0.1574803149608 | 0.16 |
| 5 mm | 0.196850393701 | 0.20 |
| 6 mm | 0.2362204724412 | 0.24 |
| 7 mm | 0.2755905511814 | 0.28 |
| 8 mm | 0.3149606299216 | 0.31 |
| 9 mm | 0.3543307086618 | 0.35 |
| 10 mm | 0.393700787402 | 0.39 |
| 11 mm | 0.43307086614220003 | 0.43 |
| 12 mm | 0.4724409448824 | 0.47 |
| 13 mm | 0.5118110236226 | 0.51 |
| 14 mm | 0.5511811023628 | 0.55 |
| 15 mm | 0.590551181103 | 0.59 |
If you’re trying to visualize the size of a gemstone based on its cut and carat weight, try a visit to GemSelect’s calibrated gemstone charts (opens in new window), where you can look up a particular gemstone’s dimensions in millimeters based on its carat weight and cut.