Int US/UK cm inches
XXS 6 1/2 54 21.2
XS 6 5/8 55 21.6
S 6 3/4 56 22.0
M 6 7/8 57 22.4
L 7 58 22.8
XL 7 1/8 59 23.2
XXL 7 1/4 60 23.6
XXXL 7 3/8 61 24.0