Women's Gizeh Big Buckle Detail Oiled Leather Thong Sandals in a 40/ size 9. Color is in “cognac” From Birkenstock, the Women's Gizeh Big Buckle Oiled Leather Thong Sandals feature: Oiled leather upper features a soft, distressed leather that emphasizes a handcrafted natural look (variations may occur) Slip-on design with adjustable buckle Oversized buckle detail Unlined Birkenstock's contoured cork footbed supports the arches of the feet and cradles the heel for all-day comfort EVA outsole Flat heel