Ring Size Conversion Chart
You can use this chart to help establish your size.
If you are unsure of your size and would like to place an order, please contact me, or consult a local jeweller.
| Australia and Europe | USA and Canada | Internal Diameter (mm) | Internal Circumference (mm) |
| H | 3 3/4 | 14.7 | 46.1 |
| H 1/2 | 4 | 14.9 | 46.7 |
| I | 4 1/4 | 15.1 | 47.4 |
| I 1/2 | 4 1/2 | 15.3 | 48.0 |
| J | 4 3/4 | 15.5 | 48.7 |
| J 1/2 | 5 | 15.7 | 49.3 |
| K | 5 1/4 | 15.9 | 49.9 |
| K 1/2 | 5 1/2 | 16.1 | 50.6 |
| L | 5 3/4 | 16.3 | 51.2 |
| L 1/2 | 6 | 16.5 | 51.8 |
| M | 6 1/4 | 16.7 | 52.5 |
| M 1/2 | 6 1/2 | 16.9 | 53.1 |
| N | 6 3/4 | 17.1 | 53.1 |
| N 1/2 | 7 | 17.3 | 54.4 |
| O | 7 1/4 | 17.5 | 55.0 |
| O 1/2 | 7 1/2 | 17.7 | 55.7 |
| P | 7 3/4 | 17.9 | 56.3 |
| P 1/2 | 8 | 18.1 | 56.9 |
| Q | 8 1/4 | 18.3 | 57.6 |
| Q 1/2 | 8 1/2 | 18.5 | 58.2 |
| R | 8 3/4 | 18.7 | 58.9 |
| R 1/2 | 9 | 18.9 | 59.5 |
| S | 9 1/4 | 19.2 | 60.1 |
| S 1/2 | 9 1/2 | 19.4 | 60.8 |
| T | 9 3/4 | 19.6 | 61.4 |
| T 1/2 | 10 | 19.8 | 62.1 |
| U | 10 1/4 | 20.0 | 62.7 |
| U 1/2 | 10 1/2 | 20.2 | 63.3 |
| V | 10 3/4 | 20.4 | 64.0 |
| V 1/2 | 11 | 20.6 | 64.6 |
| W | 11 1/4 | 20.8 | 65.2 |
| W 1/2 | 11 1/2 | 21.0 | 65.9 |
| X | 11 3/4 | 21.2 | 66.5 |
| X 1/2 | 12 | 21.4 | 67.2 |
| Y | 12 1/4 | 21.6 | 67.8 |
| Z | 12 1/2 | 21.8 | 68.4 |