EVOLUTION HELMETS ARE SIZED BASED ON CIRCUMFERENCE ONLY.  HELMET COMES WITH PADDING KITS FOR PROPER EAR CUP AND LINER SPACING.  SIZE DICTATES LINER USED WITH HELMET.  AT THIS TIME, EVOLUTION HELMETS ONLY COME IN SIZE LARGE AND UP.  NO SMALL HELMETS
 
Select your head circumference using the   left side of the chart to the right and select your helmet sizing.

OR

You can also use your known hat size using the columns to the right of the chart
Head Size Inches Head Size CM   Europe Canada/USA UK Helmet Size
20.4 52 or 52 6 1/2 6 3/8 XXS
20.8 53 or 53 6 5/8 6 1/2 XS
21.2 54 or 54 6 3/4 6 5/8 S
21.6 55 or 55 6 7/8 6 3/4 M
22.0 56.5 or 56 7 6 7/8 M
22.4 57 or 57 7 1/8 7 L
23.2 58 or 58 7 1/4 7 1/8 L
23.4 59 or 59 7 3/8 7 1/4 L
23.6 60 or 60 7 1/2 7 3/8 L
24.0 61 or 61 7 5/8 7 1/2 XL
24.8 62 or 62 7 3/4-7 7/8 7 5/8-7 7/8 XL
25.2 63 or 63 8 7 7/8 XL