Product detailed description materials: the upper part is made of Eva rubber and nylon the lining and the insole are made of polyester Eva rubber sole Size Chart – Crocs snowboots Crocs size C7 C8 C9 C10 C11 C12 C13 EU size 23/24 24/25 25/26 27/28 28/29 29/30 30/31 MAX. INNER LENGTH BOTY (MM) 150 155 165 175 180 185 195 MAX. INNER WIDTH (MM) 65 67 70 72 74 75 76 The Size Chart is prepared based on our own measurement of the selected pair of shoes. We use the Plus 12 measuring device for the length and Clevermess for the width measuring. The optimal excess for gumboots is 1-1.2 cm. Recommendation for measuring the foot and choosing a suitable size: Made in Italy, the materials meet European standards and they are harmless. Crocs Winter Puff boot - navy/red Snowboots