Biltwell Helmets Size Guide

Biltwell Helmets
Bonanza Fitment: Round Oval
Gringo/S Fitment: Intermediate Round Oval

Size Centimeters Inches Hat Size
Small 54.5 - 55.75 21 1/2 - 22 6 7/8 - 7 1/8
Medium 56 - 57.25 22 2/8 - 22 5/8 7 1/8 - 7 3/8
Large 57.5 - 58.75 22 3/4 - 23 1/4 7 3/8 - 7 5/8
X-Large 59 - 60.25 23 3/8 - 23 7/8 7 5/8 - 7 7/8
2X-Large 60.5 - 61.75 24 - 24 1/2 7 7/8 - 8 1/8