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HEAD SIZE (in.)	HEAD SIZE (cm)	HAT SIZE	STREET HELMET SIZE
20 1/2	52	6 1/2	S/M Small / Medium 52cm - 60cm
20 7/8	53	6 5/8
21 1/4	54	6 3/4
21 5/8	55	6 7/8
22	56	7
22 3/8	57	7 1/8
22 3/4	58	7 1/4
23 1/8	59	7 3/8
23 1/2	60	7 1/2
23 7/8	61	7 5/8	L/XL Large / Extra Large 61cm - 64cm
24 1/4	62	7 3/4
24 5/8	63	7 7/8
25	64	8

This chart is to help guide you in finding the correct helmet size. Actual size may vary from person to person.