SIZE:Small/Sock bottom length(cm):8-10/Suitable age:0-12 months(Newborn, 3M, 6M, 9M)SIZE:Large/Sock bottom length(cm):10-12/Suitable age:12-24 months(Newborn, 12M,18M,24M)Please Note:-Please choose the size by Sole Length,the age is just for reference.-Because of the different measurement methods,there may be 1 cm of the allowable range error.-Because of factors such as display pixel,so there may be a little color difference.