Product Color: Black Fit: Full Fit / Standard Outer Material: Faux Leather Inner Material: Imitation Leather / Warm Lining Heel Length: 5.5 cm Sole Material: Polyurethane Sole Place of Manufacture: Turkey The strap width is 31 cm for a size 38. The calf circumference is 39 cm and the leg length is 39 cm. There is a 0.5 cm difference in sizes. The product is a perfect fit. We recommend one larger size for scalloped or split feet. It is 100% handmade. It is suitable for daily use.