Womens Sizing: Small (101) 5-10, Medium (102) 11-12 Mens Sizing: Medium (102) 8.5-12, Large (103) 12.5-15 Accommodates both medium and wide widths. Comfort those tender toes with a footbed that can make a real difference! Contoured heel cup adds support while reducing foot stress. Molded side rim provides lateral stability for all-day wear. Ample arch support eliminates pain. Air flow channels for breathability. Made in the U.S.A.