| Newborn (NB) |
6-9 lbs / 2.7-4.1 kg |
up to 21.5 in. / up to 55 cm |
| 9-12.5 lbs / 4. - 5.7 kg |
21.5 - 24 in. / 55 - 61 cm |
3M / 3 months |
| 12.5 - 17 lbs / 5.7 - 7.5 kg |
24 - 26.5 in. / 61 - 69 cm |
6M / 3-6 months |
| 17 - 21 lbs / 7.5 - 9.3 kg |
up to 28.5 in. / 69- 72 cm |
9M / 6-9 months |
| 21 - 25 lbs / 9.5 -11.1 kg |
28.5 - 30.5 in. / 72 - 76 cm |
12M / 12 months |
| 25- 28 lbs / 11.1 - 12.5 kg |
30.5 - 32.5 in. / 76 - 81 cm |
18M / 18 months |
| 28 - 30 lbs / 12.5 - 13.6 kg |
32.5 - 34 in. / 81 - 86 cm |
24M / 24 months |
