Our rompers run true to size with a snug sleepwear fit. If your baby is between sizes, or you want more months of wear, size up and use the fold-over cuffs for length.
| Size | Weight | Height |
|---|---|---|
| 3-6M | 12 to 16 lb | 24 to 26 in |
| 6-9M | 16 to 20 lb | 26 to 28 in |
| 9-12M | 20 to 23 lb | 28 to 30 in |
| 12-18M | 23 to 27 lb | 30 to 32 in |
| 18-24M | 27 to 30 lb | 32 to 34 in |
How to measure
Weight is the most reliable guide for babies under one year. For toddlers, measure height from the top of the head to the heel while lying flat.
Still not sure?
Order the size that fits today. If it arrives and you would rather have a different size, unworn items with tags attached can be exchanged within 30 days. See our returns and exchanges page.