Size table

CIRCUMFERENCE MM NL US & CANADA UK
37.54 12 1/2 a
40.84 13 1 3/4 C 1/2
44.14 14 3 F
47.25 15 4 1/4 i
50.27 16 5 3/8 K 1/2
51.21 4.25 pm 5 3/4 L 1/4
51.87 16.5 6 m
53.16 17 6 1/2 N
54.82 17.5 7 1/4 O 1/2
56.45 18 7 3/4 P1/2
58.21 18.5 8 1/2 Q 3/4
60.00 19 9 1/8 S
60.38 7:25 pm 9 1/4 S 1/4
61.29 19.5 9 5/8 T
62.89 20 10 1/4 YOU
63.46 20.25 10 1/2 U 1/2
64.21 20.5 10 3/4 V 1/4
65.78 21 11 3/8 W 1/2
67.51 21.5 12 Y