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Helmet Size Conversion Chart


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HJC Helmet Sizing Chart
 Bell Helmet Sizing Chart
KLIM Helmet Sizing Chart
HJC Helmet Sizing Chart
Helmet Size Hat Size Head Circumference - Inches Head Circumference - Metric
2XS 6 3/8 - 6 1/2 20- 20 1/2 51-52
XS 6 5/8 - 6 3/4 20 7/8 - 21 1/4 53-54
S 6 7/8 - 7 21 5/8 - 22 55-56
M 7 1/8 - 7 1/4 22 1/2 - 22 7/8 57-58
L 7 3/8 - 7 1/2 23 1/4 - 23 5/8 59-60
XL 7 5/8 - 7 3/4 24 - 24 3/8 61-62
2XL 7 7/8 - 8 24 3/4 - 25 1/4 63-64
3XL 8 1/8 - 8 1/4 25 5/8 - 26 65-66
Youth S 6 1/8 - 6 1/4 19 1/4 - 19 3/4 49-50
Youth M 6 3/8 - 6 1/2 20 - 20 1/2 51-52
Youth L 6 5/8 - 6 3/4 20 7/8 - 21 1/4 53-54
Youth S/M 6 1/8 - 6 1/4 19 1/4 - 19 3/4 49-50
Youth L/XL 6 3/8- 6 1/2 20 - 20 1/2 51-52
Bell Helmet Sizing Chart
Helmet Size Hat Size Head Circumference - Inches Head Circumference - Metric
XS 6 5/8 - 6 3/4 20 7/8 - 21 1/4 53-54
S 6 7/8 - 7 21 5/8 - 22 55-56
M 7 1/8 - 7 1/4 22 3/8 - 22 3/4 57-58
L 7 3/8 - 7 1/2 23 1/4 - 23 5/8 59-60
XL 7 5/8 - 7 3/4 24 - 24 3/8 61-62
2XL 7 7/8 - 8 24 3/4 - 25 1/4 63-64
Youth S/M 6 1/8 - 6 1/4 19 1/4 - 19 3/4 49-50
Youth L/XL 6 3/8- 6 1/2 20 - 20 1/2 51-52
KLIM Helmet Sizing Chart
Helmet Size Hat Size Head Circumference - Inches Head Circumference - Metric
XS 6 5/8 - 6 3/4 20 1/2 - 20 7/8 52 - 53
S 6 15/16 - 7 3/16 21 1/4 - 21 11/16 54 - 55
M 7 1/4 - 7 3/8 22 1/16 - 22 7/16 56 - 57
L 7 1/2 - 7 5/8 22 13/16 - 23 1/4 58 - 59
XL 7 3/4 23 5/8 - 24 60 - 61
2XL 7 7/8 24 7/16 - 24 13/16 62 - 63
3XL 8 3/8 25 3/16 - 25 5/8 64 - 65