Size: 11/12/13 (Fit For 0-18 months Baby) Note:Please choose the size by Sole Length, the age is just for reference. Size Sole Length Sole Width Recommended Age 11(1) 11cm/4.33" 4.8cm/1.89" 0-6 months 12(2) 12cm/4.72" 5.2cm/1.93" 6-12 months 13(3) 13cm/5.12" 5.4cm/2.00" 12-18 months