Ring Size Information
| UK | mm / inches | USA / Canada | France | Japan | Germany |
|---|
| C | 40.2 / 1.580 | 1½ | 40½ | 12¾ | - |
| D | 41.5 / 1.634 | 2 | 41½ | 13¼ | 2 |
| E | 42.7 / 1.684 | 2½ | 42¾ | 13¾ | 3 |
| F | 44.0 / 1.739 | 3 | 44 | 14 | 4 |
| G | 45.2 / 1.788 | 3½ | 45¼ | 14½ | - |
| H½ | 46.5 / 1.836 | 4 | 46½ | 15 | 7 |
| I½ | 47.8 / 1.888 | 4½ | 47¾ | 15¼ | 8 |
| J½ | 49.0 / 1.941 | 5 | 49 | 15¾ | 9 |
| L | 50.2 / 1.992 | 5½ | 50¼ | 16 | - |
| M | 51.5 / 2.042 | 6 | 51½ | 16½ | 12 |
| N | 52.8 / 2.092 | 6½ | 52¾ | 17 | 13 |
| N½ | 54.0 / 2.146 | 7 | 54 | 17¼ | 14 |
| O½ | 55.3 / 2.196 | 7½ | 55½ | 17½ | 15 |
| P½ | 56.6 / 2.249 | 8 | 56¾ | 18 | 16 |
| Q½ | 57.8 / 2.300 | 8½ | 58 | 18½ | 17 |
| R½ | 59.1 / 2.350 | 9 | 59¼ | 19 | 18 |
| S½ | 60.3 / 2.400 | 9½ | 60½ | 19½ | 19 |
| T½ | 61.6 / 2.463 | 10 | 61¾ | 20 | 20 |
| U½ | 62.8 / 2.504 | 10½ | 62¾ | 20¼ | 22 |
| V½ | 64.1 / 2.567 | 11 | 64¼ | 20¾ | 23 |
| W½ | 66.0 / 2.608 | 11½ | 66 | 21 | 24 |
| Y½ | 67.3 / 2.658 | 12 | 67¼ | 21¾ | 25 |