Motorcycle Helmet Size Chart with Cross-Reference Guide*
by Brockton Cycle

Not sure of your size? Simply measure around your head, about one inch over your eyebrows, and just over your ears.
Measure a few times to get a consistent size.

Click a link to view a specific brand's size chart, or refer to the general helmet size chart below:

Answer/KBC/O'Neal/MSR Helmets Size Chart
Arai Helmets Size Chart
Bieffe Helmets Size Chart
Fox Racing Helmets Size Chart
HJC/Cirus Helmets Size Chart
Icon Motorcycle Helmets Size Chart
Shoei Helmets Size Chart
Suomy Helmets Size Chart

 

Circumference		CM	Hat Size	*Bell	Arai	**Bieffe	O'Neal	Shoei/HJC	KBC/MSR/Answer
20 1/2"		52	6 1/2"		XS
20 7/8"		53	6 5/8"		XS
21 1/8"			6 3/8-1/2"					XX-S	XX-S
21 1/4"		54	6 3/4"	XS	SM	XS		XS	XS
21 5/8"		55	6 7/8"	XS	SM	SM		SM	SM
22"		56	7"	SM	MD	SM	SM		SM
22 3/8"		57	7 1/8"	SM	MD	MD		MD	MD
22 3/4"		58	7 1/4"	MD	LG	MD	MD		MD
23 1/8"		59	7 3/8"	LG	LG	LG		LG	LG
23 1/2"		60	7 1/2"	LG	LG/XL	LG/XL	LG	XL	XL
24"		61	7 5/8"	XL	XL	XL		XL/XXL	XL
24 3/8"		62	7 3/4"	XL	XL/XXL	XL	XL		24 1/4+=XXL
24 3/4"		63	7 7/8"	XXL	XXL	XXL
*Bell also breaks down sizes as follows:							***Shoei breaks down sizes as follows:
21 1/2-22 1/8"=SM							6 7/8-7=SM
22 1/4-22 7/8"=MD							7 1/8-7 1/4=MD
23     -23 5/8"=LG							7 3/8-7 1/2=LG
23 3/4-24 1/2"=XL							7 5/8-7 3/4=XL
							7 7/8-8=XXL
**Bieffe also breaks down sizes as follows:
21 1/4"-21 1/2"=XS
21 5/8"-22 1/4"=SM
22 3/8"-23 1/8"=MD
23 1/4-23 7/8"=LG
24- 24 5/8"=XL
24 3/4-25"=XXL