The item is in excellent condition, having been worn only once, but the size didn't fit. Size is 40, Narrow, Black. The Madrid is one of the most enduring models from Birkenstock, a true classic. This minimalist one-strap sandal, which first appeared half a century ago as a "correction sandal," has already established its status as a fashion staple. The upper is made of Birko-Flor®, a skin-friendly and durable synthetic material.