| | 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" | | | | | | | | | | | | | | | | | |