helmet size guide

HELMET SIZE GUIDE.

This guide is provided for comparison purposes between the various helmet manufacturers.
Whist I cannot guarantee the accuracy of this information, I believe it to be correct. It must however be responsibility to correctly measure yourself according with the manufacturers suggested methods. Hope this helps!

You'll find the superb range of helmets on the site here for your perusal. If you have any questions, don't hesitate to call us on 01443 742421.

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+

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

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

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+

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

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

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