HJC Helmet Sizing Chart

Helmet Size Convention Chart

This size chart is only for reference. Always try the helmet on and follow this manual’s instructions for a proper fit.

SIZE	CENTIMETER	HAT SIZE	INCHES
XXS	51-52	6 3/8 – 6 1/2	20 – 20 1/2
XS	53 – 54	6 5/8 – 6 3/4	20 7/8 – 21 1/4
S	55 – 56	6 7/8 – 7	21 5/8 – 22
M	57 -58	7 1/8 – 7 1/4	22 1/2 – 22 7/8
L	59 -60	7 3/8 – 7 1/2	23 1/4 – 23 5/8
XL	61 – 62	7 5/8 – 7 3/4	24 – 24 3/8
2XL	63 – 64	7 7/8 – 8	24 3/4 – 25 1/4
3XL	65 – 66	8 1/8 – 8 1/4	25 5/8 – 26
4XL	67 – 68	8 3/8 – 8 1/2	26 3/8 – 26 3/4
5XL	69 – 70	8 3/4 – 8 3/4	27 1/4 – 27 5/8

 

RPHA Series, FG-Jet, FG-17 Size Chart

SIZE	CENTIMETER	HAT SIZE	INCHES
XS	54-55	6 3/4 – 6 7/8	21 1/4 – 21 5/8
S	55-56	6 7/8 – 7	21 5/8 – 22
M	57-58	7 1/8 – 7 1/4	22 1/2 – 22 7/8
L	58-59	7 1/4 – 7 3/8	23 7/8 – 23 1/4
XL	60-61	7 1/2 – 7 5/8	23 5/8 – 24
2XL	62-63	7 3/4 – 7 7/8	24 3/8 – 24 3/4
3XL	64-65	8 – 8 1/8	25 1/4 – 25 5/8

 

CL-17 & CL-17 Plus

SIZE	CENTIMETER	HAT SIZE	INCHES
XS	54-55	6 3/4 – 6 7/8	21 1/4 – 21 5/8
S	56-57	7 – 7 1/8	22 – 22 1/2
M	58-59	7 1/4 – 7 1/8	22 7/8 – 23 1/4
L	60-61	7 1/2 – 7 5/8	23 5/8 – 24
XL	62-63	7 3/4 – 7 7/8	24 3/8 – 24 3/4
2XL	63-64	8 – 8 1/8	25 1/4 – 25 5/8
3XL	65-66	8 1/8 – 8 1/4	25 5/8 – 26
4XL	67-68	8 3/8 – 8 1/2	26 3/8 – 26 3/4
5XL	69-70	8 3/4 – 8 3/4	27 1/4 – 27 5/8

Youth Size