Ring Size Chart
| UK | US | EU | 内径 | 内周 |
| I | 4 1/4 | 47 3/4 | 15.04 | 47.25 |
| J | 4 5/8 | 49 | 15.40 | 48.38 |
| K | 5 1/8 | 50 | 15.80 | 49.64 |
| L | 5 1/2 | 51 3/4 | 16.10 | 50.58 |
| M | 6 | 52 3/4 | 16.51 | 51.87 |
| N | 6 1/2 | 54 | 16.92 | 53.16 |
| O | 7 | 55 1/4 | 17.35 | 54.51 |
| P | 7 1/2 | 56 1/2 | 17.75 | 55.76 |
| Q | 8 | 57 3/4 | 18.19 | 57.15 |
| R | 8 5/8 | 59 | 18.61 | 58.47 |
| S | 9 1/8 | 60 1/4 | 19.10 | 60.00 |
| T | 9 5/8 | 61 1/2 | 19.51 | 61.29 |
| U | 10 1/4 | 62 3/4 | 20.02 | 62.89 |
| V | 10 5/8 | 63 | 20.32 | 63.84 |
| W | 11 1/8 | 65 | 20.76 | 65.22 |
| X | 11 5/8 | 66 1/4 | 21.18 | 66.54 |
| Y | 12 | 67 1/2 | 21.49 | 67.51 |
| Z | 12 1/2 | 68 3/4 | 21.89 | 68.77 |