When it comes to purchasing a helmet, actually going to a shop and physically trying the various makes and models on is the only real option if you want to get the correct fit.

You may well have measured your head and know what size you theoretically want, but the measurement of the circumference of your head is not the only thing that needs to be taken into account when choosing a helmet. Different manufacturers make helmets that are different shapes. Some will produce helmets that are spherical while other will have shells that are more oval in shape. The only way to know which make suits your head is to go to a store and try a selection on.

You know you’ve got the right shape when you put a helmet on that has a snug but not tight fit all around, with no pressure points at the edges. While you may not be able get a helmet that is an exact fit, moving the internal padding around the perimeter can help to get the fit just so.

The importance of a good fit can’t be overstated, as anyone who has ridden wearing an uncomfortable helmet will vouch for, so take the time to try on a number on options as your local bike shop.