Size Guide

Approximate sizes

Diameter
(MM / Inches)
Circumference
(MM / Inches)
12.37 / 0.487--B----1--
13.21 / 0.5241.50 / 1.634D41.51 1/2213.5
13.61 / 0.53642.70 / 1.684E42.752 3/42.513.75
14.05 / 0.55344.00 / 1.739F444314
14.45 / 0.56945.20 / 1.788G 1/445.255 1/43.514.5
14.86 / 0.58546.50 / 1.836H 1/246.256 1/2415
15.7 / 0.61849 / 1.941J 1/2499515.75
16.51 / 0.6551.50 / 2.042M52.7511 1/2616.5
17.35 / 0.68354 / 2.146O55.2514717.25
18.19 / 0.71656.60 / 2.249Q57.7516 1/2818
18.89 / 0.74859.50 / 2.342R 3/45919919
19.80 / 0.77862.10 / 2.442T 1/261.5021 1/21020
20.68 / 0.81464.60 / 2.543V 1/264241120.75
21.49 / 0.84667.20 / 2.644Y67.526 1/21221.25
22.33 / 0.87969.70 / 2.744Z+169291322