size chart
| Ring Size (USA) | Circumference (mm) | Diameter (mm) |
| 4 | 46.7 | 14.9 |
| 5 | 49.3 | 15.7 |
| 6 | 51.8 | 16.5 |
| 7 | 54.4 | 17.3 |
| 8 | 56.9 | 18.1 |
| 9 | 59.5 | 18.9 |
| 10 | 62.1 | 19.8 |
| 11 | 64.6 | 20.6 |
| 12 | 67.2 | 21.4 |
| 13 | 70.2 | 22.3 |
| Ring Size (USA) | Circumference (mm) | Diameter (mm) |
| 4 | 46.7 | 14.9 |
| 5 | 49.3 | 15.7 |
| 6 | 51.8 | 16.5 |
| 7 | 54.4 | 17.3 |
| 8 | 56.9 | 18.1 |
| 9 | 59.5 | 18.9 |
| 10 | 62.1 | 19.8 |
| 11 | 64.6 | 20.6 |
| 12 | 67.2 | 21.4 |
| 13 | 70.2 | 22.3 |
