Baby Size Chart Baby Bodysuit Size Chart (cm) Sizes Length Long Sleeve 1/2 Chest (in) 0-3 Months 37cm 22cm 22cm 3-6 Months 39cm 24cm 23cm 6-12 Months 43cm 26cm 25cm 12-18 Months 46cm 28cm 26cm 18-24 Months 48cm 30cm 27cm