romper+headband size : 4-6 months bust 30cn*2 length 41cm (66) 7-12 months bust 31cm*2 length 44cm (73) 13-18months bust 32cm*2 length 47cm (80) Dress+headband size : 13-18 months (bust 32cn*2 length 46cm (80) 18-24 month bust 33cm*2 length 49.5cm (90) 2years old (bust 35cm*2 length 52cm (100) 3 years old (bust 36.5cm*2 length 54cm (110) Romper size from 66-80 only Dress size start from 80