W7 EMU Australia Mayberry Shearling Wool Crossover Strap Slippers - Charcoal Grey From the manufacturer: 100% Australian sheepskin upper Lightweight, flexible TPR outsole with wave design for traction and support Woolmark Accredited Snug fit Official size is women’s 7 (US), but these are narrow. The website does say they will relax over time, however they do recommend sizing up if you are a half size. See pictures for measurements