International ring size conversion chart
Use UK & Australia sizing as your selected size. Use this chart to find the closest international equivalent.
| Diameter (mm) |
Circumference (mm) |
US & Canada |
Hong Kong |
Europe | UK & Australia |
Singapore & Japan |
|---|---|---|---|---|---|---|
| 13.3 | 41.8 | 2 | 4 | 41 | ||
| 13.6 | 42.7 | 2.5 | 5 | 42 | E | 3 |
| 13.9 | 43.7 | 43 | ||||
| 14.1 | 44.3 | 3 | 6 | 44 | F 1/2 | 4 |
| 14.3 | 44.9 | 45 | G | 5 | ||
| 14.5 | 45.6 | 3.5 | 7 | G 1/2 | ||
| 14.7 | 46.2 | 46 | H | 6 | ||
| 14.9 | 46.8 | 4 | 8 | 47 | H 1/2 | 7 |
| 15.1 | 47.4 | I | ||||
| 15.3 | 48.1 | 4.5 | 9 | 48 | I 1/2 | 8 |
| 15.5 | 48.7 | 10 | J | |||
| 15.7 | 49.3 | 5 | 49 | J 1/2 | 9 | |
| 15.9 | 50.0 | 11 | 50 | K | ||
| 16.1 | 50.6 | 5.5 | K 1/2 | 10 | ||
| 16.3 | 51.2 | 12 | 51 | L | ||
| 16.5 | 51.8 | 6 | 13 | 52 | L 1/2 | 11 |
| 16.7 | 52.5 | M | 12 | |||
| 16.9 | 53.1 | 6.5 | 14 | 53 | M 1/2 | 13 |
| 17.1 | 53.7 | N | ||||
| 17.3 | 54.3 | 7 | 15 | 54 | N 1/2 | 14 |
| 17.5 | 55.0 | 16 | 55 | O | ||
| 17.7 | 55.6 | 7.5 | O 1/2 | 15 | ||
| 17.9 | 56.2 | 17 | 56 | P | ||
| 18.1 | 56.9 | 8 | 57 | P 1/2 | 16 | |
| 18.2 | 57.2 | 18 | ||||
| 18.3 | 57.5 | Q | ||||
| 18.5 | 58.1 | 8.5 | 58 | Q 1/2 | 17 | |
| 18.8 | 59.1 | 19 | 59 | R | ||
| 19.0 | 59.7 | 9 | 20 | R 1/2 | 18 | |
| 19.2 | 60.3 | 60 | S | |||
| 19.4 | 60.9 | 9.5 | 21 | 61 | S 1/2 | 19 |
| 19.6 | 61.6 | T | ||||
| 19.8 | 62.2 | 10 | 22 | 62 | T 1/2 | 20 |
| 20.0 | 62.8 | U | 21 | |||
| 20.2 | 63.5 | 10.5 | 23 | 63 | U 1/2 | 22 |
