Size Guide
| US Size | UK Size | EU Size (Circumference) | Store Size | Inner Diameter |
| 5 | J 1/2 | 49 | 50 | 15.7 mm |
| 6 | L 1/2 | 52 | 60 | 16.5 mm |
| 7 | N 1/2 | 54 | 70 | 17.3 mm |
| 8 | P 1/2 | 56 | 80 | 18.1 mm |
| 9 | R 1/2 | 59 | 90 | 19.0 mm |
| US Size | UK Size | EU Size (Circumference) | Store Size | Inner Diameter |
| 5 | J 1/2 | 49 | 50 | 15.7 mm |
| 6 | L 1/2 | 52 | 60 | 16.5 mm |
| 7 | N 1/2 | 54 | 70 | 17.3 mm |
| 8 | P 1/2 | 56 | 80 | 18.1 mm |
| 9 | R 1/2 | 59 | 90 | 19.0 mm |