Sizing for Helmets

NOTE: To measure your head for the correct helmet size, wrap a tape measure around your head, about one inch above the eyes and ears, and at the point on the back of your head that will give you the largest measurement in inches. Match this measurement or your hat size to the following chart below and that is your size in HJC and SHOEI. If you are in between sizes, go with the bigger size.

HEAD CIRCUMFERENCE HELMET SIZE HAT SIZE METRIC CIRCUMFERENCE
19 3/4 - 20 1/8" Child S/M 6 1/4 - 6 1/2 50 - 52 cm.
21 1/4" Child L/XL 6 5/8 - 6 3/4 53 - 54 cm.
21 1/8" XXS 6 3/8 - 6 1/2 51 - 52 cm.
21 1/4" XS 6 5/8 - 6 3/4 53 - 54 cm.
21 5/8" Small 6 7/8 - 7 55 - 56 cm.
22 3/8" Medium 7 1/8 - 7 1/4 57 - 58 cm.
23 1/8" Large 7 3/8 - 7 1/2 59 - 60 cm.
23 1/2" X Large 7 5/8 - 7 3/4 61 - 62 cm.
24 1/4" XX Large 7 7/8 - 8 63 - 64 cm.
24 5/8" XXX Large 8 3/8 - 8 1/2 65 - 66 cm.