| Ring Size | Circumference(mm) | UK,Europe & Australia | CN/SG/JP | HK | Switzerland |
|---|---|---|---|---|---|
| 5 | 49.3 | J 1/2 | 9 | 9 | 9 |
| 6 | 51.8 | L1/2 | 12 | 12 | 12 |
| 7 | 54.4 | O | 14 | 14.5 | 14 |
| 8 | 56.9 | Q | 16 | 17.5 | 16 |
| 9 | 59.5 | S | 18 | 20 | 18 |
| Resizable | – | – | – | – | – |
| 10 | 62.1 | T1/2 | 20 | 22.5 | 20 |
| 11 | 64.6 | V1/2 | 23 | 25 | 23 |
| 12 | 67.2 | Y | 25 | 27 | 25 |
| 13 | 69.7 | Z | 27 | 30 | 27 |
