New in Box no top Birkenstock Gizeh Thong Sandals Sizes: 40 Regular = 9 Women’s 37 Regular = 6/6.5 Womens According to Poshmark. Please know your size in Birkenstocks before you purchase. Color: White The Gizeh is an addictive classic with signature support and a refined, minimalist style. Birko-Flor – durable, synthetic upper material with leather-like finish and soft backing Contoured cork footbed conforms to the shape of your foot