NACA Horse Riding Helmet Size Guide

There are 4 sizes of cap available with 9 interchangeable interior foams (from 53 to 61), allowing perfect adjustment of head circumference ranging from 53 cm to 61 cm.

By replacing the inner foam, the size of the helmet can be changed within the limits of the cap size.

For example, for cap size XS/54, you can use the interchangeable inner foam in size 53 or 54, depending on your head size.