Buying Amber rings and need help to Convert US Size to European size? Below is a conversion table :
| Diameter (mm) | Circumference (mm) | USA / Canada | UK / Australia | Asia | Switzerland |
| Europe / ISO | |||||
| 14.1 | 44.2 | 3 | F | 4 | 4 |
| 14.3 | 44.8 | F-1/2 | 5 | 5 1/2 | |
| 14.5 | 45.5 | 3 1/2 | G | ||
| 14.7 | 46.1 | G-1/2 | 6 | 6 1/2 | |
| 14.9 | 46.8 | 4 | H | 7 | |
| 15.1 | 47.4 | H-1/2 | 7 3/4 | ||
| 15.3 | 48 | 4 1/2 | I | 8 | |
| 15.5 | 48.7 | J | 9 | ||
| 15.7 | 49.3 | ...