RING SIZE MEASUREMENT
| United States | Russia size | United Kingdom | Brazil size | France size | Japan size | Perimeter (inside) |
| 5 | 15.7 | 0.5J | 12 | 49 | 9 | 49 |
| 6 | 16.5 | 0.5L | 14 | 52 | 12 | 52 |
| 7 | 17.3 | O | 17 | 54 | 14 | 55 |
| 8 | 18.1 | Q | 19 | 57 | 16 | 57 |
| 9 | 18.9 | S | 21 | 59 | 18 | 59 |
| 10 | 19.8 | 0.5T | 24 | 62 | 20 | 62 |
| 11 | 20.6 | 0.5V | 26 | 64 | 23 | 65 |
| 12 | 21.4 | 0.5X | 28 | 67 | 25 | 68 |
| 13 | 22.3 | 31 | 69 | 27 | 70 | |
| 14 | 23.1 | 33 | 72 | 29 | 72.5 |
