The Lifer helmet is available in 3 different shell sizes to accommodate different size heads.
Measure your head …
If it measures 18″ – 20.25″ get an S1 Mini Lifer Helmet
If it measures 20.5″- 23.25″ get an S1 Lifer Helmet
If it measures 23″ – 25.5″ get an S1 Mega Lifer Helmet
Fun fact: Most kids ages 6 and under will fit into the S1 Mini Lifer Helmet. And 80% of people ages 7 and up fit into an S1 Lifer Helmet.
If you are buying a helmet for someone and you can’t measure their head – follow this general rule of thumb. Ages 6 and under order an S1 Mini Lifer Helmet (and buy a Fit All Kit so they can fit it perfectly) . Ages 7 and up order an S1 Lifer Helmet (and buy a Fit All Kit so they can fit the helmet perfectly).