Ring Sizes
| Finger circumference in MM | Ring inside diameter in MM | USA | EURO | JAPAN | UK |
| 46.8 | 14.9 | 4 | 47 | 7 | H 1/2 |
| 49.3 | 15.7 | 5 | 49 | 9 | J 1/2 |
| 51.9 | 16.5 | 6 | 52 | 11 | L 1/2 |
| 54.4 | 17.3 | 7 | 54 | 14 | N 1/2 |
| 57 | 18.1 | 8 | 57 | 16 | P 1/2 |
| 59.5 | 19 | 9 | 59.5 | 18 | R 1/2 |
| 62.1 | 19.8 | 10 | 62 | 20 | T 1/2 |
| 64.6 | 20.6 | 11 | 64.5 | 23 | V 1/2 |
| 67.2 | 21.4 | 12 | 67 | 25 | X 1/2 |