SIZE GUIDE
| Circumference(mm) | Diameter(mm) | US&CA | UK&AUS | DE | FR | CH | JP |
| 49.3 | 15.7 | 5 | J1/2 | 15.75 | 49 | 9 | 9 |
| 51.8 | 16.5 | 6 | L1/2 | 16.5 | 51.5 | 11.5 | 12 |
| 54.4 | 17.3 | 7 | O | 17.25 | 54 | 14 | 14 |
| 56.5 | 18.1 | 8 | Q | 18 | 56.5 | 16.5 | 16 |
| 59.5 | 18.9 | 9 | S | 19 | 59 | 19 | 18 |
| 62.1 | 19.8 | 10 | T1/2 | 20 | 61.5 | 21.5 | 20 |
| 64.6 | 20 | 11 | V1/2 | 20.75 | 64 | 24 | 23 |
| 67.2 | 21.4 | 12 | Y | 21. 25 | 66.5 | 27.5 | 25 |