Estamico Infant Girls' Net-Yarn Lace Bow Sandals cotton Imported Lace bow decor New Size US 2.5 is for 0-6 months=3.94"/10cm; US 3.5 is for 6-12 months=4.33"/11cm; US 4.5 is for 12-18 months=4.72"/12cm hook and loop clusure Easy on and off Return and exchange is free