Size Guide
USA & Canada
Diameter (mm)
Europe
UK & Australia
314.144F
3.2514.345F1/2
3.514.545.5G
3.7514.746G1/2
414.947H
4.2515.147.5H1/2
4.515.348I
4.7515.548.5J
515.749J1/2
5.2515.950K
5.516.150.5K1/2
5.7516.351L
616.552L1/2
6.2516.752.5M
6.516.953M1/2
6.7517.154N
717.354.5N1/2
7.2517.655O
7.517.856O1/2
7.751856.5P
818.257P1/2
8.2518.458Q
8.518.658.5Q1/2
8.7518.859R
91960R1/2
9.2519.260.5S
9.519.461S1/2
9.7519.661.5T
1019.862T1/2
10.252063U
10.520.263.5U1/2
10.7520.464V
1120.665V1/2
11.2520.965.5W
11.521.166W1/2
11.7521.367X
1221.567.5X1/2
12.2521.768Y
12.521.969Z
1722.169.5Z1/2
1322.370
13.222.571Z1
13.522.771.5
13.7522.972Z2
1423.172.5Z3