To ensure proper sizing, please do the following:

Nolan Helmet Sizing:

20 ¼ - 20 7/8

21 - 21 5/8

21 ¾ - 22 3/8

22 ½ - 23 1/8

23 ¼ - 24

24 1/8 - 24 7/8

XS

SM

MD

LG

XL

XXL