Birkenstock Madrid Big Buckle Shearling Olive Oiled Leather The product is a pair of Birkenstock Madrid Big Buckle sandals in olive oiled leather, with a flat heel and adjustable strap. These unisex adult sandals in US size 7- 7.5 and EU size 38 feature a solid color design and a buckle closure. The stylish slide model from the Birkenstock Madrid Big Buckle product line offers both comfort and aesthetic appeal, making them a versatile choice for everyday wear. Shoes are almost brand new without box.