Small (Men's < 5 1/2, Women's < 7)
Medium (Men's 5 1/2 to 8, Women's 7 to 9 1/2)
Large (Men's 8 to 11, Women's 9 1/2 to 12 1/2)
Extra Large (Men's 11 and up, Women's 12 1/2 and up)
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