Sizing guide
Getting the size right matters. Here is how.
Find my size
Two easy ways to find your size:
- Get sized at any jeweller and tell us the AU/UK letter (or the US number).
- Or measure a ring that already fits — the inside diameter in millimetres — and send us the number. We will match it.
The sizes we carry
Every ring is available in these AU/UK letter sizes:
| AU / UK | Inside diameter (mm) | Circumference (mm) | EU / ISO |
|---|---|---|---|
| J | 15.5 | 48.7 | 49 |
| K | 15.9 | 50 | 50 |
| L | 16.3 | 51.2 | 51 |
| M | 16.7 | 52.5 | |
| N | 17.1 | 53.7 | 54 |
| O | 17.5 | 55 | 55 |
| P | 17.9 | 56.2 | 56 |
| Q | 18.3 | 57.5 | |
| R | 18.7 | 58.8 | 59 |
| S | 19.1 | 60 | 60 |
| T | 19.5 | 61.3 | 61 |
| U | 19.9 | 62.5 | 63 |
| V | 20.3 | 63.8 | 64 |
| W | 20.7 | 65 | 65 |
| X | 21.1 | 66.3 | |
| Y | 21.5 | 67.5 | 68 |
| Z | 21.9 | 68.8 | 69 |
| Z+1 | 22.3 | 70.1 | 70 |
Ring sizes convert approximately between systems — if you're between sizes, or converting from US, measure with a ring that already fits, or use the free ring sizer that comes with every order.