| 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 – 5.7 |
| 6M | 24 – 26.5 | 61- 67 | 12.5 – 16.5 | 5.7 – 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 |