Adult Helmet Sizes
AFX
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
3X-Large
4X-Large
Inches
21 1/4 - 21 5/8
22 - 22 7/16
22 1/3 - 23 1/4
23 5/8 - 24
24 3/8 - 24 13/16
25 3/16 - 25 5/8
26 - 26 3/8
26 3/4 - 27 1/8
CM
54 - 55
56 - 57
58 - 59
60 - 61
62 - 63
64 - 65
66 - 67
68 - 69
Hat Size
6 3/4 - 6 7/8
7 - 7 1/8
7 1/2 - 7 3/8
7 1/2 - 7 5/8
7 3/4 - 7 7/8
8 - 8 1/8
8 1/4 - 8 3/8
8 1/2 - 8 5/8
Answer
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
3X-Large
Inches
21 1/4
21 5/8
22 3/8
23 1/8
23 1/2
24 1/4
24 5/8
CM
53 - 54
55 - 56
57 - 58
59 - 60
61 - 62
63 - 64
65 - 66
Hat Size
6 5/8 - 6 3/4
6 7/8 - 7
7 1/8 - 7 1/4
7 3/8 - 7 1/2
7 5/8 - 7 3/4
8
8 3/4 - 8 1/2
Azonic
Size
2X-Small
X-Small
Small
Medium
Large
X-Large
2X-Large
3X-Large
Inches
20 3/4
20 3/4 - 20 1/2
21 1/2 - 22 1/4
22 1/4 - 23
23 - 23 3/4
23 3/4 - 24 1/2
24 1/2 - 25 1/2
25 1/2 +
CM
52
52 - 54
54 - 56
56 - 58
58 - 60
60 - 62
62 - 64
64
Hat Size
6 1/2
6 1/2 - 6 3/4
6 3/4 - 7
7 - 7 1/4
7 1/4 - 7 1/2
7 1/2 - 7 3/4
7 3/4 - 8 1/8
8 1/8
Cyber
Size
Small
Medium
Large
X-Large
Inches
21 - 21 5/8
21 3/4 - 22 3/8
22 1/2 - 23 1/8
23 1/4 - 24
Hat Size
6 3/4 - 6 7/8
7 - 7 1/8
7 1/4 - 7 3/8
7 1/2 - 8
Grex
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
Inches
21 1/4 - 21 5/8
22 - 22 3/8
22 3/4 - 23 1/8
23 1/2 - 24
24 - 24 3/8
24 3/4 - 25 1/8
CM
54 - 55
56 - 57
58 - 59
60 - 61
61 - 62
63 - 64
Hat Size
6 3/4
7 - 7 1/8
7 1/4 - 7 3/8
7 1/2 - 7 5/8
7 5/8 - 7 3/4
7 7/8 - 8
M2R
Size
2X-Small
X-Small
Small
Medium
Large
X-Large
2X-Large
Inches
20 1/2 - 20 7/8
21 1/4 - 21 5/8
22 - 22 3/8
22 3/4
23 1/8 - 23 1/2
24 - 24 3/4
25 1/8 - 25 1/2
CM
52 - 53
54 - 55
56 - 57
58 - 59
60 - 61
62 - 63
64 - 65
Hat Size
6 1/2 - 6 5/8
6 3/4 - 6 7/8
7 - 7 1/8
7 1/4
7 3/8 - 7 1/2
7 5/8 - 7 7/8
8 - 8 1/8
MDS
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
3X-Large
Inches
21 1/4 - 22
22 - 22 3/8
22 3/4
22 3/8 - 23 1/2
23 1/2 - 24
24 3/8
24 3/4
CM
54 - 56
56 - 57
57 - 60
60 - 62
63
63-64
-
Hat Size
6 3/4 - 6 7/8
7 - 7 1/8
7 1/8 - 7 1/2
7 1/2 - 7 5/8
7 3/4 - 7 7/8
7 7/8 - 8
-
No Fear
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
Inches
21 - 21 1/2
21 1/2 - 22
22 1/2 - 23
23 - 23 1/2
24 - 24 1/2
24 1/2 - 25
CM
53 - 54
54 - 55
57 - 58
58 - 59
61 - 62
62 - 63
Nolan
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
Inches
20 1/2 - 21 1/4
21 5/8 - 22
22 3/8 - 22 3/4
23 1/8 - 23 1/2
24 - 24 3/8
24 3/4
CM
52 - 54
55 - 56
57 - 59
59 - 60
61 - 62
63
Hat Size
6 5/8 - 6 3/4
6 7/8 - 7
7 1/8 - 7 1/4
7 3/8 - 7 1/2
7 5/8 - 7 3/4
7 7/8
Xpeed
Size
2X-Small
X-Small
Small
Medium
Large
X-Large
2X-Large
3X-Large
Inches
21 1/8
21 1/4
21 5/8
22 3/8
23 1/8
23 1/2
24 1/4
24 5/8
CM
50 - 52
53 - 54
55 - 56
57 - 58
59 - 60
61 - 62
63 - 64
65 - 66
Hat Sizes
6 3/8 - 6 1/2
6 5/8 - 6 3/4
6 7/8 - 7
7 1/8 - 7 1/4
7 3/8 - 7 1/2
7 5/8 - 7 3/4
7 7/8 - 8
8 3/8 - 8 1/2
Zamp
Size
X-Small
Small
Medium
Large
X-Large
2X-Large
Inches
21 1/4
22
22 7/8
23 5/8
24 3/8
24 3/4
CM
54
56
58
60
63
63
Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.
Please use this chart as a guide only. This chart is for the buyer to use as a guideline for helmet sizing assistance. Wrap a cloth measuring tape around your head just above your eyebrows. Pull the tape comfortably snug, and read the length. Figure your hat size, then convert to helmet size.