Cranium Circumference: Wrap measuring tape around your head, just above eyebrows. Note your size at the point of overlap. HELMET FIT: A correctly fitted helmet should feel like an even amount of pressure is being exerted around your head and cheeks. But, helmets break in, so it should fit as tight as you can comfortably wear it. Once fastened, you should NOT be able to pull it off your head in any direction. Attention first-time helmet buyers: If your helmet is loose at all, and doesn't fit well, it CANNOT DELIVER the best protection.

G-Force Helmet Sizing Chart<br>
Impact Helmet Sizing Chart
Zamp Helmet Sizing Chart<br>
RaceQuip Helmet Sizing Chart
Simpson Helmet Sizing Chart