Upper material: high quality PU leather Sole material: rubber Lining material: velvet Boot height: knee high Closed type: zipper Depending on your child's foot length to select the size, Foot Length + (0.5~1) CM = Shoes Inner Length. US Size 9.5 = EU Size 26 = Insole length 6.46"/16.4 CM US Size 10 = EU 27 = Insole length 6.69"/17 CM US Size 11 = EU Size 28 = Insole length 6.97"/17.7 CM US Size 11.5 = EU Size 29 = Insole length 7.24"/18.4 CM US Size 12 = EU Size 30 = Insole length 7.48"/19 CM US Size 13 = EU Size 31 = Insole length 7.76"/19.7 CM US Size 1 = EU Size 32 = Insole length 8.03"/20.4 CM US Size 1.5 = EU Size 33 = Insole length 8.31"/21.1 CM US Size 2.5 = EU Size 34 = Insole length 8.58"/21.8 CM US Size 3.5 = EU Size 35 = Insole length 8.86"/22.5 CM US Size 4 = EU Size 36 = Insole length 9.06"/23 CM US Size 5 = EU Size 37 = Insole length 9.25"/23.5 CM