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Conversion Chart

STEP 1: Measure

Use a measuring tape to measure around your head one inch above your eyebrows. Or use a string to measure and then lay it out and measure the length of the string.

Helmet Sizing

STEP 2: Choose Size

Use the chart to convert measurement to hat size

STEP 3: Select Your Helmet

Select the helmet model you would like to purchase and review the specific size range available and order accordingly.

HEAD SIZE INCHES HEAD SIZE CM HAT SIZE
19  50 ¼
20 51 6
20 ⅜ 52 6 ½
20 ¾ 53 6 ⅝
21 ¼ 54 6 ¾
21  55 6 ⅞
22 56 7
22  57 7 ⅛
22 ¾ 58 7 ¼
23  59
23  60 7 ½
24 61 7 ⅝
24  62 7 ¾
Disclaimer: This conversion chart is a guide only and does not constitute a guarantee as to the fit of the helmet. Some people may have a unique head shape changing what size they need. Some helmets fit different shaped heads better than others.