How to measure your head for Motocross Helmet Sizing

The single most important piece of safety gear is your helmet, yet so many people still do not know how they are supposed to fit! The easiest way to explain this is you want your helmet to feel snug, a helmet which fits you correctly will be tight around your cheeks, if your teeth are catching some of your cheeks while you talk with a helmet on that is about perfect. Also check the back of the helmet where the base of the helmet meets the back of your head, this should also be a snug fit so if you can fit your fingers in between here the helmet is too big!

When ordering online knowing your measurements is going to be your biggest advantage, all helmets are sized in S (small), M (medium), L (large) increments. There is a range of CM measurements associated with each size too. 

To accurately measure your head, use a cloth tape measure wrapped around your head horizontally about one inch above your eyebrows and ears, take the CM measurement of the circumference of your head.


Every helmet size will cover a range of 1cm. See below a size chart to make this clearer: 

Adult Motocross Helmet Sizing:

  • XS (extra small) 53-54cm
  • SM (small) 55-56cm
  • MD (medium) 57-58cm
  • LG (large) 59-60cm
  • XL (extra large) 61-62cm
  • 2XL (2 extra large) 63-64cm

Kids Motocross Helmet Sizing:

  • Small 47-48cm
  • Medium 49-50cm
  • Large 51-52cm

Please note:

Always aim to get a tight fitting helmet, if you fall between sizes round the size down, not up. The exception to the rule being kids as they are growing you would be safe to round up to the nearest CM to allow for room to grow. Everyone has a slightly different shaped head, and most helmets are a slightly different fit from brand to brand. Try as many on as you can until you find a brand which is the right shape for your head as the better the fit, the better the ride!

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