98% of adults fit easily in our 2 sizes. To measure your head, circle the crown of your head with a string or dental floss (above eyebrows and ears). Use a ruler to measure the string and compare to the above chart. If in between sizes, choose the larger. Upon receiving your hat, loosen or tighten the rear sizing tape for a custom fit. Fit the hat slightly above eyebrows and ears to allow front and peripheral vision. Crown fabric should remain loose.

To measure your child's head, circle the crown of the head with a string or dental floss (above eyebrows and ears). Use a ruler to measure the string and compare to the above chart. If in between sizes, choose the larger.