Note: Please measure the length of your foot(heel to toe), for example, if your foot is 18.2 cm, choose a size 30. Measure: Place your heel against a vertical wall, use a marker pen to draw the farthest point of your toes from the wall, and measure the length of your foot with a ruler. Size = recommended foot length(cm) Size: 26=15.8CM Size: 27 = 16.4CM Size: 28 = 17.1 CM Size: 29=17.8CM Size: 30=18.4CM Size: 31 = 19.1 CM Size: 32 = 19.7 CM Size: 33 = 20.4 CM Size: 34 = 21 CM Size: 35 = 21.7 CM Size: 36 = 22.4 CM Size: 37 = 23.1 CM Size: 38=23.8CM Size: 39=24.4CM Size: 40=25CM Size: 41=25.5CM Size: 42=26CM Size: 43=26.5CM Size: 44=27CM Size: 45=27.5CM Size: 46=28CM Children's Sneakers Lightweight Summer's Breathable Kids Sports Shoes Non-slip Comfortable Running Shoes