Baby Onesie Size Chart
| Measurement | NB | 6M | 12M | 18M | 24M |
| Body Length | 10-3/4 | 11-3/4 | 12-3/4 | 13-3/4 | 14-1/4 |
| Body Length Tolerance | 1 | 1 | 1 | 1 | 1 |
| Chest Tolerance | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 |
| Chest Width (Laid Flat) | 7-1/2 | 9 | 10 | 11 | 12 |
| Sleeve Length | 2-1/2 | 2-3/4 | 3 | 3-1/2 | 3-1/4 |
Sizing is based on items laid flat for measurement.