Jewelry guide
Rings sizes
EU size and inner circumference are the same number (circumference in mm).
| USA | EU | diameter (mm) | circumference (mm) |
|---|---|---|---|
| 3 | 44.2 | 14.08 | 44.2 |
| 3.5 | 45.5 | 14.48 | 45.5 |
| 4 | 46.8 | 14.90 | 46.8 |
| 4.5 | 48.0 | 15.28 | 48.0 |
| 5 | 49.3 | 15.70 | 49.3 |
| 5.5 | 50.6 | 16.12 | 50.6 |
| 6 | 51.9 | 16.52 | 51.9 |
| 6.5 | 53.1 | 16.90 | 53.1 |
| 7 | 54.4 | 17.32 | 54.4 |
| 7.5 | 55.7 | 17.74 | 55.7 |
| 8 | 57.0 | 18.14 | 57.0 |
| 8.5 | 58.3 | 18.56 | 58.3 |
| 9 | 59.5 | 18.94 | 59.5 |
| 9.5 | 60.8 | 19.36 | 60.8 |
| 10 | 62.1 | 19.78 | 62.1 |
| 10.5 | 63.4 | 20.18 | 63.4 |
| 11 | 64.6 | 20.56 | 64.6 |
| 11.5 | 65.9 | 20.98 | 65.9 |
| 12 | 67.2 | 21.40 | 67.2 |