Size Guide
Internal Diameter | UK/NZ/AU | USA | Europe |
---|---|---|---|
15.8mm | J ½ | 5 | |
16mm | K | ||
16.2mm | K ½ | 5.5 | |
16.4mm | L | ||
16.6mm | L ½ | 6 | 52 |
16.8mm | M | ||
17mm | M ½ | 6.5 | 53 |
17.2mm | N | ||
17.4mm | N ½ | 7 | 54 |
17.6mm | O | ||
17.8mm | O ½ | 7.5 | |
18mm | P | ||
18.2mm | P ½ | 8 | 57 |
18.4mm | Q | ||
18.6mm | Q ½ | 8.5 | 58 |
18.8mm | R | ||
19mm | R ½ | 9 | |
19.2mm | S | ||
19.4mm | S ½ | 9.5 | 61 |
19.6mm | T | ||
19.8mm | T ½ | 10 | 62 |
20mm | U | ||
20.2mm | U ½ | 10.5 | 63 |
20.4mm | V |