Ring Size Conversion Chart
Found the ring of your dreams? You can consult this chart to help establish your size.
If you are unsure of your size order a ring sizer, contact me, or if you are not in Australia consult a local jeweller.
| Australia and Europe | USA and Canada | Internal Diameter (mm) | Internal Circumference (mm) |
| G 1/2 | 3 3/4 | 14.7 | 46.1 |
| H | 4 | 14.9 | 46.7 |
| H 1/2 | 4 1/4 | 15.1 | 47.4 |
| I | 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 |