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Helmet Sizes
Use a tape measure to measure the circumference of your forehead at the
position you want the helmet liner to rest.
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Forehead Circumference in Inches
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Helmet Size
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Forehead Circumference in Centimeters
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20 1/4 - 20 7/8
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X Small
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51 - 53 |
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21 - 21 5/8
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Small
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53.3 - 55 |
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21 3/4 - 22 3/8
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Medium
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55.2 - 56.8 |
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22 1/2 - 23 1/8
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Large
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57.2 - 58.7 |
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23 1/4 - 24
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X Large
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59 - 61 |
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24 1/8 - 24 7/8
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XX Large
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61.3 - 63.2 |
Note-If you don't have a tape measure, you can use a piece of string.
Wrap the string around your forehead about where you want the helmet liner
to rest. Then use a ruler or yard stick to measure the string!
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