Please Note:
These are guidelines and we cannot guarantee a specific size will fit.
| Circumference (mm) | Diameter (mm) | EU Sizing | US Sizing | UK Sizing |
| 43.1 | 14.6 | 46 | 3.5 | G 1/2 |
| 46.8 | 14.9 | 47 | 4 | H 1/2 |
| 48 | 15.3 | 48 | 4.5 | I 1/2 |
| 48.7 | 15.6 | 49 | 5 | J |
| 50 | 15.9 | 50 | 5.5 | K |
| 51.2 | 16.2 | 51 | 5.75 | L |
| 52.5 | 16.6 | 52 | 6 | L 1/2 |
| 53.1 | 16.9 | 53 | 6.5 | M 1/2 |
| 53.8 | 17.3 | 54 | 7 | N |
| 55.1 | 17.5 | 55 | 7.25 | O |
| 56.3 | 17.8 | 56 | 7.5 | P |
| 57.6 | 18.2 | 57 | 8 | P 1/2 |
| 58.2 | 18.5 | 58 | 8.5 | Q 1/2 |
| 58.9 | 18.8 | 59 | 8.75 | R |
| 60.2 | 19.1 | 60 | 9 | S |
| 61.4 | 19.5 | 61 | 9.5 | S 1/2 |
| 62.1 | 19.7 | 62 | 10 | T |