Sizing guide
Baby pajama size by weight
Weight predicts fit better than age. Use this chart to find the right size for your baby’s current weight. When baby is between two ranges, height breaks the tie.
| Size | Weight | Height | Typical age |
|---|---|---|---|
| NB | Up to 10 lb | Up to 21.5 in | Newborn–4 weeks |
| 0-3M | 8–13 lb | 21–24 in | 1–3 months |
| 3-6M | 12–17 lb | 23–26 in | 3–6 months |
| 6-12M | 16–22 lb | 25–29 in | 6–12 months |
| 12-18M | 20–27 lb | 28–32 in | 12–18 months |
| For child’s safety, garment should fit snugly. This garment is not flame resistant. Loose-fitting garment is more likely to catch fire. | |||
| 18-24M | 24–30 lb | 30–34 in | 18–24 months |
| For child’s safety, garment should fit snugly. This garment is not flame resistant. Loose-fitting garment is more likely to catch fire. | |||
| 2T | 27–32 lb | 32–36 in | 24–30 months |
| For child’s safety, garment should fit snugly. This garment is not flame resistant. Loose-fitting garment is more likely to catch fire. | |||
Babies vary. Weight is the best predictor of fit.
How our sizing works
Our footie pajamas are cut snug, as CPSC sleepwear standards require for sizes 12M and above. Snug means the fabric lies flat against the body — not tight, not baggy. Choose the size that fits your baby’s current weight.
The 95% viscose from bamboo, 5% spandex knit has 4-way stretch, which gives a little natural give across all sizes. This means baby can wear each size through the full weight range without the fit feeling stiff.
When baby is in an overlap zone — say, 12 lb between 0-3M and 3-6M — use height as the tiebreaker. A 23-inch baby at 12 lb is at the very top of 0-3M and the very bottom of 3-6M; at that point either fits.
Shop by size
All five colors available NB through 2T on Amazon.
More sizing guides: What size for a 9-month-old? · Newborn vs 0-3M