Birkenstock Gizeh Women's Thong Style Birko Flor Sandal In Blue in size 39 which is a women’s size 9 Hardly worn as you can see through the photos The Birkenstock Gizeh is an iconic classic with signature support and a refined, minimalist style. The upper is made from skin-friendly, hard-wearing synthetic material Birko-Flor. It has an anatomically shaped cork/latex footbed and a suede lining for comfort and support to your feet. The lightweight EVA insole ensures comfort of your feet. It has an anatomically shaped toe cap for easy wearing.