Infant Size Chart

Infant Sizes

Child Age US Measurements  Metric Measurements
Preemie 18 in (up to 6 lbs) 46 cm (2.7 kg)
Newborn 18 – 21.5 in (6 – 9 lbs) 46 – 55 cm (2.7 – 4 kg)
0 - 3 months 21 – 24 in (9 – 12.5 lbs) 55 – 61 cm (4 – 5.7 kg)
3 - 6 months 24 – 27 in (12.5 – 17 lbs) 61 – 69 cm (5.7 - 7.8 kg)
6 - 9 months 27 – 28.5 in (17 – 21 lbs) 69 – 72 cm (7.8 – 9.5 kg)
12 months 28 - 30 in (21 – 25 lbs) 72 – 76 cm (9.5 – 11.1 kg)
18 months 30 – 32 in (25 – 28 lbs) 76 – 81 cm (11.1 – 12.5 kg)
24 months 32 - 34 in (28 – 30 lbs) 81 – 86 cm (12.5 13.6 kg)

 

*Above are approximate measurements for each size