These fashion sports style baby toddler shoes are very durable & Anti-slip US2.5(CN12)/4.49in(internal length)/4~4.33in(foot length)/6~9Month(recommended age) US3(CN13)/4.72in(internal length) /4.33~4.53in(foot length)/9~12Month(recommended age) US3.5(CN14)/4.92in(internal length)/4.53~4.72in(foot length)/12~15Month(recommended age) US4(CN15)/5.12in(internal length)/4.72~4.92in(foot length)/15~18Month(recommended age) ...