When trying to decide between two sizes, choose the larger size for a better fit.
| Size | Chest | Waist | Hips | Height | Weight |
| Newborn (0-6) | 17 - 18 | 17 - 18 | 18 | 23 - 26 | 12-18 |
| Infant (6-12) | 18 - 19 | 18 - 19 | 19 | 26 - 29.5 | 16-22 |
| Infant (12-18) | 19 - 20 | 19 - 20 | 20 | 29.5 - 31.5 | 20-26 |
| Infant (18-24) | 20 - 21 | 19 - 20 | 21 | 31.5 - 33.5 | 24-28 |
| Toddler (1-2) | 20 - 21 | 19 - 20 | 21 | 31.5 - 33.5 | 24-28 |
| Toddler (3-4) | 21 - 23 | 20 - 21 | 23 | 33.5 - 41.5 | 29-38 |
| *in inches |
