Size Chart

UK Size US Size Diameter (mm) Circumference (mm) Fit
J 5 15.7 mm 49.3 mm Her
K 5.5 16.1 mm 50.6 mm Her
L 6 16.5 mm 51.9 mm Her
M 6.5 16.9 mm 53.1 mm Her
N 7 17.3 mm 54.4 mm Her
O 7.5 17.7 mm 55.7 mm Her
P 8 18.1 mm 57.0 mm Her
Q 8.5 18.5 mm 58.3 mm His
R 9 18.9 mm 59.5 mm His
S 9.5 19.4 mm 60.8 mm His
T 10 19.8 mm 62.1 mm His
U 10.5 20.2 mm 63.4 mm His
V 11 20.6 mm 64.6 mm His
W 11.5 21.0 mm 65.9 mm His