Official Kask Size Guide

The size of Kask helmets corresponds to the circumference of your head in centimeters. Measure with a soft tape measure 1 cm above your eyebrows and above your ears, keeping it parallel to the ground.

Official Kask Size Chart

Head Circumference (cm) = Size	Equivalency (hat size)
51	6 3/8
52	6 1/2
53	6 5/8
54	6 3/4
55	6 7/8
56	7
57	7 1/8
58	7 1/4
59	7 3/8
60	7 1/2
61	7 5/8
62	7 3/4
63	7 7/8

Source: Official Kask chart (kask.com).

If your measurement falls between two sizes, choose the larger one and adjust with the helmet's dial/pads.