Sizing: XS (37-38) US Womens 6/7 - US Mens 5/6 S (39-40) US Womens 8/9 - US Mens 7/8 M (41-42) US Womens 10/10.5 - US Mens 8.5/9 L (43-44) US Womens 11.5/12.5 - US Mens 9.5/10