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Bell Helmets Size Chart

SizeCMInches
Universal Youth52 - 5720.4 - 22.4
Universal Women's52 - 5720.4 - 22.4
Universal Adult54 - 6121.2 - 24
Universal XL58 - 6522.8 - 25.5
S52 - 5620.5 - 22
M55 - 5921.625 - 23.25
L58 - 6222.875 - 24.375
XL61 - 6524 - 25.625