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 | 15.7 | 49.3 | 49 |
| K | 15.9 | 50 | 50 |
| L | 16.51 | 51.9 | 52 |
| M | 16.92 | 53.1 | 53 |
| N | 17.32 | 54.4 | 54 |
| P | 18.14 | 57 | 57 |
| R | 18.95 | 59.5 | |
| S | 19.35 | 60.8 | 61 |
| T | 19.76 | 62.1 | 62 |
| U | 20.17 | 63.4 | 63 |
| V | 20.57 | 64.6 | 65 |
| W | 20.98 | 65.9 | 66 |
| X | 21.39 | 67.2 | 67 |
| Y | 21.79 | 68.5 | |
| Z | 22.2 | 69.7 | 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.
Confirming — ask us for O, Q and Z+1 while we finalise these.