S (small)

6 3/4 – 6 7/8

21 1/8 – 21 1/2

54 – 55

M (medium)

7 – 7 1/8

21 7/8 – 22 1/4

56 – 57

L (large)

7 1/4 – 7 3/8

22 5/8 – 23

58 – 59

XL (extra lg)

7 1/2 – 7 5/8

23 1/2 – 23 7/8

60 – 61

S/M (small/med)

6 3/4 – 7 1/8

21 1/8 – 22 1/4

54 – 57

L/XL (large/xlg)

7 1/4 – 7 5/8

22 5/8 – 23 7/8

58 – 61