This Size Chart is intended for reference only. Sizes can vary between brands.
Baby (sizes 0-24M)
US Size Age (in month) Height(in inches) Weight (in pounds)
P Preemie up to 17 up to 5
NB Newborn up to 20 5 - 8
3M 0 - 3M 20 - 23.5 8 - 12.5
6M 3 - 6M 24 - 25.5 13 - 16.5
9M 6 - 9M 26 - 27.5 17 - 20.5
12M 9 - 12M 28 - 30.5 21 - 23.5
18M 12 - 18M 31 - 32.5 24 - 26.5
24M 18 - 24M 33 - 34.5 27 - 30