Basic size information of this clothes:Size: 0-3 Months//3-6 Months/6-9 Months (Fit For 0-9 months Baby)Size----------------Bust---------------Sleeve length------ Length(From top to bottom)------Height(For referrence)-----Weight(For referrence)0-3 Months(3M)------11.81"*2/30CM------8.26"/21CM----------20.07"/51CM---------------------≦23.62"-------------------≦11.02lb3-6 Months(6M)------13.38"*2/34CM------9.44"/24CM----------21.25"/54CM---------------------≦25.59"-------------------≦16.53lb6-9 Months(9M)------14.17"*2/36CM------10.23"/26CM---------22.04"/56CM---------------------≦27.55"-------------------≦19.84lbNote : It is manual measurement, there may be 1-2cm error. Thanks for your understanding.Notice: amazon's size chart is bigger than normal size, please follow amazon's chart and ours to choose size, not based on size of other brand.Moleya provide high quality clothes for baby, girls, boys and teenagers.The size of clothes is measured by hand, please allow slight difference.Note: Please check the size carefully such as sleeve length, length, it will be very troublesome if you have to return the goods due to size problem. Thanks very much for your time and patience. You should immerse clothes in salt-water for 20 minutes after you receive the package, then wash it so as to clean and disinfect the clothes and decrease fading for future wash.