♥♥ size : Fit for 2-10 year-old kid 

♥  ♥  ♥     size 18 =length18cm(2.5-3.5 years old)
♥  ♥  ♥  size20=length20cm (4-5 years old)
♥  ♥  ♥ size22=length22cm (5-7years old)