Please make sure to confirm the size before making a purchase.Not every pair of shoes is in standard sizes.The inner length of the shoes is measured manually, and there may be a reasonable error of about 0.5cm Regarding the selection of children's shoe sizes, please note the following: Most children's shoe sizes are based on manufacturer's standards and do not have a unified standard (different shoes of the same size may have different dimensions). Please measure the foot length. For summer models, it is recommended that foot length + 0.5cm = shoe inner length. For spring/autumn and winter models, it is recommended that foot length + 1cm = shoe inner length (the cm indicated after each size is the shoe's inner length) 1