Ring Size Measuring
The size is based on the U.S size standard.
| Size（U.S) |
Circumference (mm) |
Euro |
Japan | Hong Kong | Switzerland |
| 5 | 49.3½ | J½ | 3.54 | 4.33 | 3.94 |
| 6 | 51.9 | ½ | 4.72 | 5.12 | 12¾ |
| 7 | 54.4 | N½（O） | 5.51 | 6.3 | 15¼ |
| 8 | 57 | P½（Q） | 6.3 | 7.09 | 17¾ |
| 9 | 59.5 | R½（S） | 7.09 | 7.87 | 20¼ |
| 10 | 62.1 | T½ | 7.87 | 8.66 | 21½ |
| 11 | 64.6 | V½ | 9.06 | 9.84 | 9.84 |
| 12 | 67.2 | X½（Y） | 9.84 | 10.63 | 27½ |
| 13 | 70 | 0 | 0 | 0 | 0 |
| 14 | 72.8 | 0 | 0 | 0 | 0 |
