| Ring Size | Circumference(mm) | UK,Europe & Australia | CN/SG/JP | HK | Switzerland |
|---|---|---|---|---|---|
| 2 | 41 | – | – | 3 | – |
| 3 | – | – | – | – | – |
| 4 | 46 | – | – | – | – |
| 4.5 | 47.97 | I- 1/2 | 8 | 8 | – |
| 5 | 49.32 | J -1/2 | 9 | 9 | 9 |
| 5.5 | 50.5 | I | 11 | 9 | – |
| 6 | 51.87 | M | 12 | 11 | 11.5 |
| 6.5 | – | – | – | – | – |
| 7 | 54.51 | O | 14 | 14 | 15 |
| 7.5 | 55 | p | 15 | 15 | – |
| 8 | 57.15 | Q | 16 | 17 | 16.5 |
| 8.5 | – | – | – | – | – |
| 9 | 59.34 | R 1/2 | 18 | 19 | 19 |
| 9.5 | – | – | 19 | – | – |
| Resizable | – | – | – | – | – |
| 10 | 62.33 | T 1/2 | 20 | 22 | 21.5 |
| 10.5 | 63.77 | v | 21 | – | – |
| 11 | 64.97 | – | 23 | – | 24 |
| 11.5 | 66.22 | – | – | – | – |
| 12 | 67.51 | – | 25 | – | 27 |
| 12.5 | 68.77 | – | – | – | – |
| 13 | 70.15 | – | – | 29 | – |
