1. Measurement
Measuring the head is a starting point for the entire sizing procedure. Due to varying shapes, heads that are apparently the same size when measured by a tape may not necessarily fit the same size helmet.
A small metal tape measure, or a cloth tape may be used to make your initial measurement.
The circumference of the head should be measured at a point approximately one inch above the eyebrows in front, and at a point in the back of the head that results in the largest possible measurement. Take several measurements, to make sure you have the largest one.
PLEASE NOTE THAT THIS IS A ROUGH GUIDE AND NOT EXACT. THE SHAPE OF YOUR HEAD IS AS IMPORTANT AS THE MEASUREMENT WHICH MAY AFFECT FINAL FIT!
Auto & Motorcycle
| Size | Centimeters | Inch's |
| XS | 54 | 21 1/4" |
| S | 56 | 22" |
| Med | 58 | 22 7/8" |
| LG | 60 | 23 5/8" |
| XL | 62 | 24 3/8" |
| XXL | 63 | 24 3/4" |