Helmet Sizing

Size

Hat Size

Inches

Centimeters

Small

6-7/8-7

21-5/8-22

55-56

Medium

7-1/8-7-3/8

22-3/8-22-3/4

57-58

Large

7-1/2-7-5/8

23-1/4-23-5/8

59-60

X-Large

7-3/4-7-7/8

24-24-3/8

61-62