Bell Helmet Sizing

NOTE: These sizing charts are provided by the manufacturer and/or distributor responsible for this brand. Atlantic Moto makes no guarantees regarding the accuracy of measurements and/or fit provided on this page.

Correctly fitting and sizing a helmet is an extremely important process. There are many factors that go into getting the right helmet size, no matter what you've "always worn". Factors like head shape, cheek thickness, crown padding, and so on go far beyond a simple size measurement. The right helmet will not only be quieter and not move around on your head, it will do a much better job of protection.

Bell Helmet Sizes (including Star Moto 8 Mag helmets etc )

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!

YOUTH HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM) HAT SIZE
Youth SM 19 1/2" - 20" 50cm - 51cm 5 7/8 - 6 1/8
Youth MD 20" - 20 1/2" 51cm - 52cm 6 1/8 - 6 3/8
Youth LG 20 1/2" - 21" 52cm - 53cm 6 3/8 - 6 5/8


ADULT HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM) HAT SIZE
XS 20 7/8" - 21 1/4" 53cm - 54cm 6 5/8 - 6 3/4
SM 21 5/8" - 22" 55cm - 56cm 6 7/8 - 7
MD 22 3/8" - 22 3/4" 57cm - 58cm 7 1/8 - 7 1/4
LG 23 1/4" - 23 5/8" 59cm - 60cm 7 3/8 - 7 1/2
XL 24" - 24 3/8" 61cm - 62cm 7 5/8 - 7 3/4
XXL 24 3/4" - 25 1/4" 63cm - 64cm 7 7/8 - 8


Auto Helmet Sizing Chart

ADULT HELMET SIZE HEAD CIRC. (IN) HEAD CIRC. (CM) HAT SIZE
XXS 21 1/4" - 21 5/8 54cm - 55cm 6 3/4 - 6 7/8
XS 22 56cm 7
SM 22 3/8" 57cm 7 1/8
MD 22 3/4" - 23 1/8" 58cm - 59cm 7 1/4 - 7 3/8
LG 23 1/2" - 23 7/8" 60cm - 61cm 7 1/2 - 7 5/8
XL 24 1/4" 62cm 7 3/4
M3 XTRA 8 25 1/8" - 25 1/2" 64cm - 65cm 8
M3 XTRA 8 1/4 25 7/8" - 26 1/4" 66cm - 67cm 8 1/4
M3 XTRA 8 1/2 26 3/8" 68cm 8 1/2


Use the charts above to determine your correct Bell Helmet Size.

View all Sizing Guides

Ecommerce Shopping Cart by Volusion.

Atlantic Moto is UpFront