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PROUDLY CANADIAN | EASY RETURNS | NO RE-STOCKING FEES!
PROUDLY CANADIAN | EASY RETURNS | NO RE-STOCKING FEES!

509 Altitude Helmet Size Chart

509 Adult Altitude Helmet Size Chart

Size XS SM MD LG XL 2XL 3XL 4XL
US Hat Sizes 6 58 - 6 34 6 78 - 7 7 18 - 7 14 7 38 - 7 12 7 58 - 7 34 7 78 8 - 8 18 8 14
Inches 20 78 - 21 14 21 58 - 22 22 38 - 22 34 23 18 - 23 12 23 78 - 24 14 24 58 25 - 25 38 25 34
Centimeters 53 - 54 55 - 56 57 - 58 59 - 60 61 - 62 63 64 - 65 66


509 Youth Altitude Helmet Size Chart

Size SM MD LG
US Hat Sizes 6 6 18 - 6 14 6 38 - 6 12
Inches 18 18 - 18 78 19 14 - 19 58 20 - 20 12
Centimeters 47 - 48 49 - 50 51 - 52