SizeHeight (inches)Height (CM)Weight (lb)Weight (kg)
Preemie (P)Up to 17Up to 43Up to 5Up to 2.26
Newborn (NB)Up to 21.5Up to 555 - 82.2 – 3.6
3M21.5 - 2455 - 618 – 12.53.6 – 5.7
6M24 – 26.561- 6712.5 – 16.55.7 – 7.4
9M26.5 – 28.567 - 7216.5 - 20.57.4 - 9.2
12M28.5 – 30.572 - 7820.5 - 24.59.2 - 11.1
18M30.5 – 32.578 - 8324.5 - 27.511.1 - 12.4
24M32.5 – 3483 - 8627.5 - 3012.4 - 13.6