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Sizing Charts

OS1ST UNISEX FOOT SLEEVE

Size Small Medium Large X-Large 2X-Large
 
Arch Circumference 5"-8" 7"-10" 9"-13" 11"-15" 13"-18"
 
US Men's Shoe Size 3-5.5 6-9.5 10-13 13.5-15 15.5+
 
US Women's Shoe Size 4-6.5 7-10.5 11+ - -
 
UK Shoe Size 1-3 4-8 9-13 14-16 17+
 
EU Shoe Size 33-36 37-41 42-46 47-50 51+

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