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You are here: Home > MOTORCYCLE HELMETS > Helmet Size Chart


Measuring your head properly is critical to insure a proper helmet fit and proper fit is essential for the best possible head protection during an impact. Proper fit is something that you definately want to get right the first time, so please follow these instructions carefully. MxMotorsports strongly recommends using a cloth tape (sewing measuring tape) or a string and then measure the string with a conventional measuring tape. MxMotorsports also strongly recommends using the metric increments on the tape for the most accurate measurement.

Measuring: 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 and it is best to use the largest result.


MxMotors Motorcycle Helmet Sizing Chart*********

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