Scott Helmets Size Chart

Scott 350 Tread Helmet
Adult Helmets
Size CM Inches Hat Sizes
X-Small 53 - 54 21.25 6 5/8 - 6 3/4
Small 55 - 56 21.625 6 7/8 - 7
Medium 57 - 58 22.375 7 1/8 - 7 1/4
Large 59 - 60 23.125 7 3/8 - 7 1/2
X-Large 61 - 62 23.5 7 5/8 - 7 3/4
2X-Large 63 - 64 24.25 8
Scott Youth 250 Afterlife Helmet
Youth Helmets
Size CM Inches Hat Sizes
Youth Small 48.3 - 49.5 19.25 6 - 6 1/8
Youth Medium 50.8 - 52.1 20.25 6 3/8 - 6 1/2
Youth Large 53.3 - 54.6 21.25 7 3/8 - 7 1/2

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