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Sena Helmets Size Charts

Adult Helmets
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Size Head (cm) Head (in) Hat Size
XS 53 - 54 20 7/8" - 21 1/4" 6 5/8 - 6 7/8
S 55 - 56 21 5/8" - 22" 6 7/8 - 7
M 57 - 58 22 1/2" - 22 7/8" 7 1/8 - 7 1/4
L 59 - 60 23 1/4" - 23 5/8" 7 3/8 - 7 1/2
XL 61 - 62 24" - 24 3/8" 7 5/8 - 7 3/4
2XL 63 - 64 24 3/4" - 25 1/8" 7 7/8 - 8
Wrap a soft, flexible measuring tape horizontally around your head 1 inch above your eyebrows and ears. Pull the tape softly snug, read the length and repeat for accuracy. Use the largest measurement.
Select the helmet size that is closest to your head measurement from the size chart above. If your head measurement falls between two helmet sizes, it is suggested to go with the smaller size.

Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.