Material:Breathable Mesh Fabric upper, Lightweight EVA and Rubber Sole,soft and comfortable.Lace-up design can be freely adjusted according to the comfort of the foot.Outsole:Flexible ,stability EVA Sole,shock absorption,gives the foot maximum range in movement.About Size:Please check the size chart and measure your child's foot length before purchasing. If your feet are fat or wide, please choose one bigger size.Size Info:1 inch=25.4mmUS 11 (Little Kid)=EU 28=foot length 188mm(7.4")US 11.5 (Little Kid)=EU 29=foot length 195mm(7.7")US 12 (Little Kid)=EU 30=foot length 202mm(7.95")US 13 (Little Kid)=EU 31 =foot length 209mm(8.2")US 1 (Little Kid)=EU 32=foot length 216mm(8.5")US 2 (Little Kid)=EU 33=foot length 223mm(8.8")US 3 (Big Kid)=EU 34=foot length 230mm(9.1")Warm Tips:Please allow little different in products' color due to different environment lighting reasons. 1-2 cm error of measuring is a reasonable range due to different measurement methods. If you have any questions, please don't hesitate to contact with us.We will reply to you as soon as possible!