HJC Helmets - Sizing Chart

HJC Helmets Sizing Chart

HJC Sizing Charts

Never buy a used helmet or borrow someone else’s helmet. Over time the protective foam in helmets will adjust to the contours of a user’s head. A used or borrowed helmet may not offer as much protection as a new helmet.

How to measure: Wrap a cloth (soft) measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.

Please note: The size charts are only for reference. Always try the helmet on and follow this manual’s instructions for a proper fit.

Helmet Size Convention Chart

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 1/4 – 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 Helmet 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 22 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

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 3/8 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

SIZE CENTIMETER HAT SIZE INCHES
YOUTH S 49-50 6 1/8 – 6 1/4 19 1/4 – 19 3/4
YOUTH M 51-52 6 3/8 – 6 1/2 20 – 20 1/2
YOUTH L 53-54 6 5/8 – 6 3/4 20 7/8 – 21 1/4
YOUTH XL 55-56 6 7/8 – 7 21 5/8 – 22


Shop the full HJC range

If you have any further questions, just reach out and our team will be happy to provide further advice around correct fitment advice.