What Size Zippy Should a 6-Month-Old Wear? Size Chart
What size zippy does a 6-month-old wear?
Go by your baby's height and weight, not their age. Most 6-month-olds fit our 6–12M zippy (26–29 in, 17–24 lb). If your baby is still under 26 in or 17 lb, the 3–6M (24–26 in, 13–17 lb) will fit better. If your baby is between sizes, our size chart says to size up, or message us and we'll help you pick.
Zippy size chart (height and weight)
All figures come from our pajama size chart, which covers our own Soluna™ bamboo and Zinza™ TENCEL™ lyocell pajamas. Measurements are approximate.
| Size | Height | Weight |
|---|---|---|
| NB / 0–1M | up to 21 in | up to 10 lb |
| 0–3M | 21–24 in | 10–13 lb |
| 3–6M | 24–26 in | 13–17 lb |
| 6–12M | 26–29 in | 17–24 lb |
| 12–18M | 29–32 in | 24–27 lb |
| 18–24M | 32–34 in | 27–30 lb |
Zippy garment measurements (inches, finished pajama)
| Size | Chest (around) | Total length | Sleeve (from center back neck) | Inseam |
|---|---|---|---|---|
| 3–6M | 18.5 | 23.625 | 14 | 10.625 |
| 6–12M | 18.5 | 26.625 | 15.25 | 12.125 |
| 12–18M | 19 | 29.25 | 16.25 | 13.25 |
The 3–6M and 6–12M have the same chest measurement (18.5 in). The 6–12M is 3 in longer, so length is usually what decides it.
Quick ways to choose
- Baby is 26 in+ or 17 lb+: 6–12M
- Baby is under 26 in and under 17 lb: 3–6M
- Between sizes, or you want it to last longer: size up (per our size chart). Convertible fold-over feet on both our Soluna™ and Zinza™ zippies let you switch between footed and footless wear.
- Stretch: both fabrics have stretch. Zinza™ is 95% Lyocell / 5% Spandex. Soluna™ is 95% bamboo viscose / 5% spandex with high recovery stretch.
- Care: buy the size that fits now; there's no need to size up for shrinking.
- Soluna™ Bamboo (from the product page's Product care section): "Machine wash cold with like colors on a gentle cycle. Turn inside out before washing to help protect the print and keep the fabric feeling soft. Tumble dry low or hang to dry when possible. Do not bleach. Do not iron on print. Avoid high heat, fabric softeners, and harsh stain treatments to help preserve the fit, color, and fabric quality."
- Zinza™ TENCEL™ (from the product page's Product care section): "We recommend washing in cold water, using gentle detergent, and avoiding harsh chemicals or bleach. For best results, line dry or tumble dry on low heat."
- Our pajamas don't shrink.
Shop zippies in 6–12M
- All zippies
- Winter Gingerbread Zinza™ Convertible Zippy
- Holly Berry Zinza™ Convertible Zippy
- Harbor Dreams Soluna™ Bamboo Zippy
Note: some older prints run NB–12–18M only.
FAQ
Should I size up in baby pajamas? If your baby is between sizes, our size chart says to size up, or message us for help.
What's the difference between 3–6M and 6–12M? In our zippies, the 6–12M is about 3 in longer (26.625 vs. 23.625 in total length) and has the same 18.5 in chest.
How do I know if a zippy is too small? Look for these signs: - Stretched or pulling zipper: the zipper strains or puckers when closed. - Tight shoulders and chest: the fabric pulls across the shoulders or chest. - Red marks or indentations: marks on the skin at the cuffs, neck or legs. - No more foot cuff use: you can no longer fold over or use the convertible foot cuffs. - Riding up: the zippy rides up at the crotch.
Bamboo note: ultra-soft bamboo viscose has high recovery stretch, so a snug look isn't always too small unless the zipper or seams pull.
Do your zippies shrink? No. For Soluna™ bamboo: "Tumble dry low or hang to dry when possible." For Zinza™: "line dry or tumble dry on low heat." See the full Product care section on each product page.
Does this size chart apply to every brand you sell? No. It covers only our own Soluna™ bamboo and Zinza™ TENCEL™ pajamas. Other brands have their own sizing, so check each product page.