From Birkenstock, the Women's Gizeh Big Buckle Leather Thong Sandals feature: Leather upper Thong construction Slip on design with adjustable buckle for a custom fit Oversized buckle for an elevated look Birkenstock contoured cork footbed supports the arch of the foot and features a deep heel cup for all day comfort EVA outsole for traction and cushion Flat heel Imported. Styling Notes: Birkenstock footwear is made in European whole sizes. The style selected is a Birkenstock regular footbed that will fit most medium feet.