Take a soft measuring tape and wrap it around your head about 1 inch above your eyebrows and ears. Most snow helmets are measured in centimeters, so unless you love calculations, measure your head in centimeters. For example, if you measure the circumference of your head and it is 57 cm, you will wear a 57 cm helmet or Medium (57-59cm), based on the D•CURVE sizing scale.
Don’t have a soft tape measure? Take a piece of string and wrap it around your head and then measure the string.
After you receive your helmet, put it on. The helmet should feel snug. A properly fitting snow helmet needs to be snug all the way around your head so that it doesn’t move around. You don’t want any excess space between the helmet and your head. Be careful to pay attention to any pressure or pain points.
With the helmet on your head, shake your head around. If the helmet moves on its own or shakes separately from your head, it’s too big. Use your hand and move the helmet to the left and right, up and down. The skin of your head should move with the helmet without the helmet shifting on its own. You can choose to buckle the helmet at this point if you wish, but it will not impact the fit of the actual helmet, just keep the helmet on your head.
Is the helmet too tight? If your head is feeling squeezed or doesn’t fit all the way onto your head, then your helmet is too tight. You should be able to wear your helmet comfortably all day.