I missed the opportunity to wear these and am listing them as unused. There was a review stating, "My usual shoe size is 26.5 or 27cm, and the M size was just right." DESIGN "A new type of sandal that fuses leather sandals and sports sandals." Inheriting WYM's iconic shark sole, this sandal is designed with an exquisite balance that is neither too sporty nor too dressy. The sole was created entirely from scratch for this item, with fine adjustments made to the width of the shark sole and the depth of the grooves, further creating a silhouette that gently flares towards the bottom. FABRIC "A combination of neoprene material and leather-like material with a fresh look." Cushioned neoprene material is used for the parts that touch the skin, and a leather-like material with fine embossing is used for the upper and sole. The belts and buckles are original and made of black metal to match the color. Recommended Sizes Size S: 25.5 - 26cm Size M: 26.5 - 27cm Size L: 27.5 - 28cm