Adidas ACTIVEFLEX BOA 4.0 Abrasion Resistant Low top Kids Lifestyle Shoes Black White Gold Children Aged 3 7 Years Old. 35 2½ 3 21. 34 2 2½ 21. 33.5 1½ 2 20.5. 33 1 1½ 20. 32 13½k 1 19.5. 31.5 13k 13½k 19.