Size	Height (inches)	Height (CM)	Weight (lb)	Weight (kg)
Preemie (P)	Up to 17	Up to 43	Up to 5	Up to 2.26
Newborn (NB)	Up to 21.5	Up to 55	5 - 8	2.2 – 3.6
3M	21.5 - 24	55 - 61	8 – 12.5	3.6 – 5.6
6M	24 – 26.5	61- 67	12.5 – 16.5	5.6 – 7.4
9M	26.5 – 28.5	67 - 72	16.5 - 20.5	7.4 - 9.2
12M	28.5 – 30.5	72 - 78	20.5 - 24.5	9.2 - 11.1
18M	30.5 – 32.5	78 - 83	24.5 - 27.5	11.1 - 12.4
24M	32.5 – 34	83 - 86	27.5 - 30	12.4 - 13.6