These are in excellent condition, having been worn only once, but unfortunately, the size didn't fit. Size is 39, Narrow, Black. The Madrid is the longest-running model from Birkenstock and 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.