Birkenstock Madrid Big Buckle in a high-shine, patent natural leather. This specific shade is often referred to as Purple Dusk or Açai.  Key Product Details Model: Madrid Big Buckle. Style: A single-strap slide featuring an oversized, elegant pin buckle. Material: The upper is made from high-shine patent natural leather, and the footbed is typically lined with soft piumato leather for an "exquisite" finish. Footbed: Features the classic Birkenstock anatomically shaped cork-latex footbed designed for support and comfort.  40: The European size. 260: The length of the footbed in millimeters (260 mm). L9 M7: These are the equivalent US sizes. L9 stands for Ladies' 9, and M7 stands for Men's 7. Footprint Icon (Solid): The filled-in footprint indicates a narrow fit. (An outline-only footprint would indicate a regular/wide fit). ***In the last photo I show a small scratch on the sole of the left sandal that is imperceptible and does not affect the sandal's stride, but I wanted to let you know.