NWT Birkenstock Arizona Big Buckle Sandal in Black Oiled Leather with Silver Buckles. Size 40. I wear a size 9 in sandals and this is my preferred size in this Birkenstock style. From Birkenstock: An icon of timeless design and legendary comfort, the Arizona sandal has been defining style since 1973. Gleaming big buckles make a statement on oiled leather, designed to age beautifully with wear for a unique, well-traveled patina. With an original contoured footbed for support, it'll feel uniquely yours wherever you take it. Contoured cork-latex footbed creates custom support with wear Oiled leather upper gives each pair a unique finish Smooth leather footbed lining EVA sole is flexible and lightweight Two straps with oversized metal pin buckles Made in Germany