Sizing guide
The ring size chart below specifies the diameter (the measurement across the ring) for each UK ring size, in millimetres. The difference between each whole size is 0.4mm.
| UK size | Diameter (mm) |
|---|---|
| J | 15.9 |
| K | 16.3 |
| L | 16.7 |
| M | 17.1 |
| N | 17.5 |
| O | 17.9 |
| P | 18.3 |
| Q | 18.7 |
| R | 19.1 |