International Ring Size Chart
| INSIDE CIRCUMFERENCE (mm) |
AUS / UK / NZ | US & CANADA |
|---|---|---|
| 44.2 | F | 3 |
| 44.8 | F 1/2 | 3.25 |
| 45.5 | G | 3.5 |
| 46.1 | G 1/2 | 3.75 |
| 46.8 | H | 4 |
| 47.4 | H 1/2 | 4.25 |
| 48 | I | 4.5 |
| 48.7 | I 1/2 | 4.75 |
| 49.3 | J | 5 |
| 50 | J 1/2 | 5.25 |
| 50.6 | K | 5.5 |
| 51.2 | K 1/2 | 5.75 |
| 51.9 | L | 6 |
| 52.5 | L 1/2 | 6.25 |
| 53.1 | M | 6.5 |
| 53.8 | M 1/2 | 6.75 |
| 54.4 | N | 7 |
| 55.1 | N 1/2 | 7.25 |
| 55.7 | O | 7.5 |
| 56.3 | O 1/2 | 7.75 |
| 57 | P | 8 |
| 57.6 | P 1/2 | 8.25 |
| 58.3 | Q | 8.5 |
| 58.9 | Q 1/2 | 8.75 |
| 59.5 | R | 9 |
| 60.2 | R 1/2 | 9.25 |
| 60.8 | S | 9.5 |
| 61.4 | S 1/2 | 9.75 |
| 62.1 | T | 10 |
| 62.7 | T 1/2 | 10.25 |
| 63.4 | U | 10.5 |
| 64 | U 1/2 | 10.75 |
| 64.6 | V | 11 |
| 65.3 | V 1/2 | 11.25 |
| 65.9 | W | 11.5 |
| 66.6 | W 1/2 | 11.75 |
| 67.2 | X | 12 |
| 67.8 | X 1/2 | 12.25 |
| 68.5 | Y | 12.5 |
| 69.1 | Z | 12.75 |