Proper helmet fit is a vital component to the performance
of a helmet during an impact. In order for the helmet to perform
properly during an impact, it must stay securely on the head.
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. Alternatively, a string
can be used which can then be laid against a measuring tape.
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