Helmet Sizing Charts

The circumference of the head should be measured at a point approximately one inch above the eyebrows in front, and at a point in the back of the head that results in the largest possible measurement. Take several measurements, to make sure you have the largest one.

PLEASE NOTE THAT THIS IS AN APPROXIMATE GUIDE AND NOT EXACT. THE SHAPE OF YOUR HEAD IS AS IMPORTANT AS YOUR HEAD MEASUREMENT WHICH MAY AFFECT FINAL FIT!

AGV Helmets
INCHES	SIZE	METRIC(cm)
21 1/4	X-Small	54
22	Small	56
22 3/4	Medium	58
23 1/2	Large	60
24 3/8	X-Large	62
24 3/4	XX-Large	63

Arai Helmets
INCHES	SIZE	METRIC(cm)
20 1/2	X-Small	52
20 7/8	X-Small	53
21 1/4	Small	54
21 5/8	Small	55
22	Medium	56
22 3/8	Medium	57
22 3/4	Large	58
23 1/8	Large	59
23 1/2	Large/X-Large	60
24	X-Large	61
24 3/8	X-Large/XX-Large	62
24 3/4	XXX-Large	63

Bell Helmets
INCHES	SIZE		METRIC(cm)
19 3/4	6	Youth S/M	50-51
20 1/2	6 3/8	Youth L/XL	52-53
21 1/4	6 3/4	XX-Small	54
21 5/8	6 7/8	X-Small	55
22	7	Small	56
22 3/8	7 1/8	Small/Medium	57
22 3/4	7 1/4	Medium	58
23 1/8	7 3/8	Medium/Large	59
23 1/2	7 1/2	Large	60
23 7/8	7 5/8	Large/X-Large	61
24 1/4	7 3/4	X-Large	62
24 5/8	7 7/8	XX-Large	63
25	8	XXX-Large	64
25 3/8+	8 1/8+	XXXX-Large	65+

Fox Racing Helmets
INCHES	SIZE	METRIC(cm)
18 3/4 - 19 5/8	Kid's Small (KS)
19 1/4 - 20	Kid's Medium (KM)
20 1/8 - 21	Kid's Large (KL)
20 1/2 - 21 1/8	X-Small
21 1/4 - 22 1/8	Small
22 3/8 - 23 1/8	Medium
23 1/4 - 23 3/4	Large
22 7/8 - 24 3/4	X-Large
24 7/8 - 25 3/4	XX-Large

Fox Helmets
INCHES	SIZE	METRIC(cm)
21 1/2	X-Small
22 1/4	Small
23	Medium
23 3/4	Large
24 1/4	X-Large
24 3/4	XX-Large

HJC Helmets
INCHES	SIZE	METRIC(cm)
20 - 20 1/2	XX-Small	52-53
20 7/8 - 21 1/4	X-Small	53-54
21 5/8 - 22	Small	55-56
22 1/2 - 22 7/8	Medium	57-58
23 1/4 - 23 5/8	Large	59-60
24 - 24 3/4	X-Large	61-62
24 3/4 - 25 1/4	XX-Large	63-64
25 5/8 - 26	XXX-Large	65-66

Icon Helmets
INCHES	SIZE	METRIC(cm)
21 1/8	XX-Small	53
21 1/4	X-Small	54
21 5/8	Small	55
22 3/8	Medium	57
23 1/8	Large	59
23 1/2	X-Large	60
24	X-Large/XX-Large	61

KBC Helmets
INCHES	SIZE	METRIC(cm)
21 1/8	XX-Small	53
21 1/4	X-Small	54
21 5/8	Small	55
22	Small	56
22 3/8	Medium	57
22 3/4	Medium	58
23 1/8	Large	59
23 1/2	X-Large	60
24	X-Large	61
24 1/4	XX-Large	62

M2R Helmets
INCHES	SIZE	METRIC(cm)
18 7/8	Youth Small
19 5/8	Youth Medium
20 1/4	Youth Large
21 3/8	X-Small	54 3/4
22 1/8	Small	56 1/8
23	Medium	58 1/4
23 5/8	Large	60 1/4
24 1/2	X-Large	62 1/4
25	XX-Large	63 7/8

Nolan Helmets
INCHES	SIZE	METRIC(cm)
21 1/4	X-Small	55
21 5/8	Small	56
22	Small	57
22 1/2	Medium	58
22 7/8	Medium	59
23 1/4	Large	60
23 5/8	Large	61
24	X-Large	62
24 1/2	X-Large	63
24 7/8	XX-Large	64

One Helmets
INCHES	SIZE	METRIC(cm)
20 7/8 - 21/14	X-Small	53-54
21 3/8 - 22	Small	55-56
22 1/8 - 22 7/8	Medium	57-58
23 1/8 - 23 7/8	Large	59-60
24 - 24 1/2	X-Large	61-62
24 5/8 - 25 1/2	XX-Large	63-64

Pyrotect Helmets
INCHES	SIZE		METRIC(cm)
21 1/4	6 3/4	XX-Small	54
21 5/8	6 7/8	X-Small	55
22	7	Small	56
22 3/8	7 1/8	Small/Medium	57
22 3/4	7 1/4	Medium	58
23 1/8	7 3/8	Medium/Large	59
23 1/2	7 1/2	Large	60
23 7/8	7 5/8	Large/X-Large	61
24 1/4	7 3/4	X-Large	62
24 5/8	7 7/8	XX-Large	63
25	8	XXX-Large	64
25 3/8+	8 1/8+	XXXX-Large	65+

Rodia Helmets
INCHES	SIZE	METRIC(cm)
20 1/4	X-Small	51
21	Small	53
21 3/4	Medium	55
22 1/2	Large	57
23 1/4	X-Large	59
24 1/8	XX-Large	61

Schuberth Helmets
INCHES	SIZE	METRIC(cm)
20 7/8	X-Small	53
21 5/8	Small	55
22 7/16	Medium	57
23 1/4	Large	59
24	X-Large	61
24 13/16	XX-Large	63

Scorpion Helmets
INCHES	SIZE	METRIC(cm)
21 1/4	X-Small - (6 5/8 - 6 3/4)	53-54
21 5/8	Small - (6 7/8 - 7)	55-56
22 3/8	Medium - (7 1/8 - 7 1/4)	57-58
23 1/8	Large - (7 3/8 - 7 1/2)	59-60
23 1/2	X-Large - (7 5/8 - 7 3/4)	61-62
24 1/4	XX-Large - (7 7/8 - 8)	63-64
25 1/2	XXX-Large - (8 1/8 - 8 1/4)	65-66

Shark Helmets
SIZE		METRIC(cm)
X-Small		53/54
Small		55/56
Medium		57/58
Large		59/60
X-Large		61/62

Shoei Helmets
INCHES	SIZE	METRIC(cm)
20 1/2	XX-Small	52
20 7/8	X-Small	54
21 1/4	Small	56
22 1/4	Medium	58
23	Large	60
23 7/8	X-Large	62
24 1/2	XX-Large	64

Suomy Helmets
INCHES	SIZE	METRIC(cm)
20 1/2 - 20 7/8	X-Small	53-54
21 1/4 - 21 5/8	Small	55-56
22 - 22 1/2	Medium	57-58
22 7/8 - 23 1/4	Large	59-60
23 5/8 - 24	X-Large	61-62
24 1/2 - 24 7/8	XX-Large	63-64
25 1/4 - 25 5/8	XXX-Large	65-66

Simpson Helmets
INCHES	SIZE	METRIC(cm)
20 3/8 - 21 1/8	X-Small	52-54
21 1/8 - 22	Small	54-56
22 - 22 3/4	Medium	56-58
22 3/4 - 23 1/2	Large	58-60
23 1/2 - 24 1/4	X-Large	60-62
24 1/4 - 25 1/8	XX-Large	62-64

Thor Helmets
INCHES	SIZE	METRIC(cm)
20 1/2	XX-Small	52
20 7/8	X-Small	53
21 1/4	X-Small	54
21 5/8	Small	55
22	Small	56
22 3/8	Medium	57
22 3/4	Medium	58
23 1/8	Large	59
23 1/2	Large	60
24	X-Large	61
24 3/8	X-Large	62
24 3/4	XX-Large	63
25 1/8	XX-Large	64

Troy Lee Designs Helmets
INCHES	SIZE	METRIC(cm)
21 1/4 - 22	Small	54 - 56
22 - 22 3/4	Medium	56 - 58
22 3/4 - 23 5/8	Large	58 - 60
23 5/8 - 24 1/2	X-Large	60 - 62

Vega Helmets
INCHES	SIZE	METRIC(cm)
19.15 - 19.50	Youth Small	49 - 50
20.10 - 20.45	Youth Medium	51 - 52
20.87 - 21.26	Youth Large	53 - 54
20.87 - 21.26	X-Small	53 - 54
21.65 - 22.05	Small	55 - 56
22.44 - 22.83	Medium	57 - 58
23.23 - 23.62	Large	59 - 60
24.02 - 24.41	X-Large	61 - 62
24.80 - 25.20	XX-Large	63 - 64
25.60 - 26.00	XXX-Large	65 - 66

Vemar Helmets
INCHES	SIZE	METRIC(cm)
21 5/8	X-Small	54
22 1/2	Small	56
23 1/4	Medium	58
24	Large	60
24 7/8	X-Large	62

Winex Helmets
INCHES	SIZE	METRIC(cm)
21 1/8	XX-Small
21 1/4	X-Small
21 5/8	Small
22 3/8	Medium
23 1/8	Large
23 1/2	X-Large
24 1/4	XX-Large

Zamp Helmets
INCHES	SIZE	METRIC(cm)
20 1/8	XX-Small
20 3/4	X-Small
21 1/2

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Helmets Sizing Chart