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Bell Helmet Sizing

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!

Size Cross Reference

Motorcycle Helmet Sizing Chart

YOUTH HELMET SIZEHEAD CIRC. (IN)HEAD CIRC. (CM)HAT SIZE
Youth SM19 1/2" - 20"50cm - 51cm5 7/8 - 6 1/8
Youth MD20" - 20 1/2"51cm - 52cm6 1/8 - 6 3/8
Youth LG20 1/2" - 21"52cm - 53cm6 3/8 - 6 5/8


ADULT HELMET SIZEHEAD CIRC. (IN)HEAD CIRC. (CM)HAT SIZE
XS20 7/8" - 21 1/4"53cm - 54cm6 5/8 - 6 3/4
SM21 5/8" - 22"55cm - 56cm6 7/8 - 7
MD22 3/8" - 22 3/4"57cm - 58cm7 1/8 - 7 1/4
LG23 1/4" - 23 5/8"59cm - 60cm7 3/8 - 7 1/2
XL24" - 24 3/8"61cm - 62cm7 5/8 - 7 3/4
XXL24 3/4" - 25 1/4"63cm - 64cm7 7/8 - 8


Auto Helmet Sizing Chart

ADULT HELMET SIZEHEAD CIRC. (IN)HEAD CIRC. (CM)HAT SIZE
XXS21 1/4" - 21 5/854cm - 55cm6 3/4 - 6 7/8
XS2256cm7
SM22 3/8"57cm7 1/8
MD22 3/4" - 23 1/8"58cm - 59cm7 1/4 - 7 3/8
LG23 1/2" - 23 7/8"60cm - 61cm7 1/2 - 7 5/8
XL24 1/4"62cm7 3/4
M3 XTRA 825 1/8" - 25 1/2"64cm - 65cm8
M3 XTRA 8 1/425 7/8" - 26 1/4"66cm - 67cm8 1/4
M3 XTRA 8 1/226 3/8"68cm8 1/2

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