Baby Onesie & Bodysuit Size Chart
This Baby Onesie & Bodysuit size chart covers 5 sizes (0–3M – 18–24M) across 3 measurements: length, chest width and shoulder width. Values are in inches, and you can switch the table to centimetres.
Size chart
| Age | Length (in) | Chest Width (in) | Shoulder Width (in) |
|---|---|---|---|
| 0–3M | 9 | 8 | 6 |
| 3–6M | 10 | 8.5 | 6.5 |
| 6–12M | 11 | 9 | 7 |
| 12–18M | 12 | 9.5 | 7.5 |
| 18–24M | 13 | 10 | 8 |
Baby sizes are a guide by age; weight and height are more reliable, so size up if your baby is above average.
How to measure
- ALength
Lay the item flat and measure straight down from the highest point of the shoulder to the bottom hem.
- BChest Width
Lay the garment flat and measure straight across from one armpit seam to the other.
- CShoulder Width
Measure across the back from the tip of one shoulder seam straight to the other.
About these measurements: they're typical values for this kind of product, meant as a starting point. Every brand's fit is different, so adjust them to match your own garments before publishing.
