What size helmet should I buy?
The three most popular helmets from S-One are the S-One Kid Helmet, The S-One Lifer Helmet and the S-One Big Head Helmet so use this chart to figure out which helmet to buy for you or your kids.
The S-One Helmet Sizing Chart
S-One Kid Helmet fits 18.5" - 20.5"
Hat Size: 6 = Head Size: 18 7/8" = S-One Kid Helmet Size: X-Small
Hat Size: 6 1/8 = Head Size: 19 3/8" = S-One Kid Helmet Size: Small
Hat Size: 6 1/4 = Head Size: 19 5/8" = S-One Kid Helmet Size: Medium
Hat Size: 6 3/8 = Head Size: 20" = S-One Kid Helmet Size: Large
Hat Size: 6 1/2 = Head Size: 20 1/2" = S-One Kid Helmet Size: X-Large
S-One Lifer Helmet fits 21" - 23.5"
Hat Size: 6 5/8 = Head Size: 20 7/8" = S-One Lifer Helmet Size: Small
Hat Size: 6 3/4 = Head Size: 21 1/4" = S-One Lifer Helmet Size: Small
Hat Size: 6 7/8 = Head Size: 21 5/8" = S-One Lifer Helmet Size: Medium
Hat Size: 7 = Head Size: 22" = S-One Lifer Helmet Size: Large
Hat Size: 7 1/8 = Head Size: 22 3/8" = S-One Lifer Helmet Size: Large
Hat Size: 7 1/4 = Head Size: 22 3/4" = S-One Lifer Helmet Size: X- Large
Hat Size: 7 3/8 = Head Size: 23 1/4" = S-One Lifer Helmet Size: 2X-Large
Hat Size: 7 1/2 = Head Size: 23 5/8" = S-One Lifer Helmet Size: 3X-Large
S-One Big Head Helmet fits 23.75" - 24.25"
Hat Size: 7 5/8 = Head Size: 24" = S-One Big Head Helmet Size: 2 X-Large
Hat Size: 7 3/4 = Head Size: 24 3/8" = S-One Big Head Helmet Size: 3X-Large
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