Klim Adult Helmets Size Chart

F4 Helmet - 2012
Helmets
Size Hat Size Head Circum
X-Small 6 5/8 - 6 3/4 20 8/16" - 20 14/16"
Small 6 15/16 - 7 3/16 21 4/16" - 21 11/16"
Medium 7 1/4 - 7 3/8 22 1/16" - 22 7/16"
Large 7 1/2 - 7 5/8 22 13/16" - 23 4/16"
X-Large 7 3/4 23 10/16" - 24"
2X-Large 7 7/8 24 7/16" - 24 13/16"
3X-Large 8 3/8 25 3/16" - 25 10/16"

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