Size guide
We use standard US sizing. Please use the table below to determine your size.
| Diameter (mm) | Circumference (mm) | US | UK |
| 15.9 mm | 49.95 mm | 5 | J½ |
| 16.7 mm | 52.46 mm | 6 | L½ |
| 17.5 mm | 54.98 mm | 7 | N½ |
| 18.3 mm | 57.49 mm | 8 | P½ |
| 19.1 mm | 60.00 mm | 9 | R½ |
| 19.9 mm | 62.52 mm | 10 | T½ |
| 20.7 mm | 65.03 mm | 11 | V½ |
