Sizing
We can send you a free sizing kit.
| Circumference | Inside Diameter | Ring Size | ||
| (mm) | (mm) | UK | Europe | US |
| 37.8mm | 11.9mm | A | - | 1/2 |
| 39.1mm | 12.3mm | B | - | 1 |
| 40.4mm | 12.7mm | C | - | 1 1/2 |
| 41.7mm | 13.1mm | D | 41 1/2 | 2 |
| 42.9mm | 13.5mm | E | 42 3/4 | 2 1/2 |
| 44.2mm | 13.9mm | F | 44 | 3 |
| 45.5mm | 14.3mm | G | 45 1/4 | 3 3/8 |
| 46.8mm | 14.7mm | H | 46 1/2 | 3 3/4 |
| 48.0mm | 15.1mm | I | 47 3/4 | 4 1/4 |
| 48.7mm | 15.5mm | J | 49 | 4 5/8 |
| 50.0mm | 15.9mm | K | 50 | 5 1/8 |
| 51.2mm | 16.3mm | L | 51 3/4 | 5 1/2 |
| 52.5mm | 16.7mm | M | 52 3/4 | 6 |
| 53.8mm | 17.1mm | N | 54 | 6 1/2 |
| 55.1mm | 17.5mm | O | 55 1/4 | 7 |
| 56.3mm | 17.9mm | P | 56 1/2 | 7 1/2 |
| 57.2mm | 18.2mm | Q | 57 3/4 | 8 |
| 58.9mm | 18.6mm | R | 59 | 8 5/8 |
| 60.2mm | 19.1mm | S | 60 1/4 | 9 1/8 |
| 61.4mm | 19.5mm | T | 61 1/2 | 9 5/8 |
| 62.7mm | 20.0mm | U | 62 3/4 | 10 1/4 |
| 64.0mm | 20.3mm | V | 63 | 10 5/8 |
| 65.3mm | 20.7mm | W | 65 | 11 1/8 |
| 66.6mm | 21.1mm | X | 66 1/4 | 11 5/8 |
| 67.8mm | 21.5mm | Y | 67 1/2 | 12 |
| 68.5mm | 21.5mm | Z | 68 3/4 | 12 |