What Do Americans Call a Baby Grow? | US vs UK Baby Clothing Terms
US vs UK Baby Clothing Terms Quiz
UK Term
A one-piece garment worn by babies, typically made of cotton or cotton blends.
US Term
Onesie
More US Baby Clothing Terms
Sleep sack
UK: Baby sleepsuit
Footed pajamas
UK: Footed pajamas
Rompers
UK: Romper
Bodysuit
UK: Varies (often similar)
Ever seen a tiny, snap‑closed one‑piece on a newborn and wondered what Americans call it? In the UK it’s known as a baby grow, but across the Atlantic the label changes. If you’re shopping for infant wear, traveling with a baby, or just love language quirks, you’ll want to know the American equivalents and how they differ.
What Americans Call a Baby Grow
In the United States the garment most people refer to is the Onesie. A onesie is a one‑piece, snap‑front bodysuit that covers the torso and usually has short or long sleeves. The name comes from the idea of “one piece” clothing for babies, making dressing fast and keeping diapers in place.
While "onesie" dominates the market, you’ll also encounter the term bodysuit. In everyday conversation the two are interchangeable, though "bodysuit" sometimes hints at a slightly slimmer cut, often used for fashion‑forward infant outfits.
How the Terms Differ
American baby‑wear vocabulary includes a few more pieces that overlap with the UK baby grow concept:
- Sleep sack - a wearable blanket that zips up the front, ideal for colder nights.
- Footed pajamas - a full‑body sleeper with attached feet, often made of soft fleece.
- Infant clothing - the broader category that includes onesies, bodysuits, rompers, and more.
In American English the word "onesie" has become the catch‑all, while in British English "baby grow" still reigns.
Choosing the Right Piece for Your Baby
Here’s a quick decision guide:
- Temperature control: Pick a onesie or bodysuit for warm days. Add a sleep sack or footed pajamas for colder evenings.
- Activity level: Onesies with snap‑crotch panels make diaper changes a breeze-perfect for outings.
- Style vs practicality: Bodysuits often feature trendy prints and a slimmer silhouette, while classic onesies prioritize durability.
Most US retailers provide a size chart that matches age in months to weight ranges. When in doubt, go a size up; babies grow quickly and a slightly larger fit extends usability.
Where to Buy in the US
Big‑box stores like Target and Walmart carry generic onesies in bulk packs. For organic fabrics, check out baby clothing stores such as Carter’s, HannaAndersson, or boutique shops on Etsy. Many parents swear by the durability of cotton‑ring‑spun onesies from the brand Burt’sBee.
If you’re traveling, most airport duty‑free shops stock a small selection, but the best deals are online. Look for multi‑packs (5‑pack or 10‑pack) to save on per‑item cost, especially during seasonal sales.
Quick Reference Table
| UK Term | US Term | Typical Use | Fabric Preference |
|---|---|---|---|
| Baby grow | Onesie | Everyday wear, easy diaper changes | Cotton, cotton‑blend |
| Baby sleepsuit | Sleep sack | Night‑time warmth | Fleece, bamboo |
| Romper | Rompers / Play suits | Playtime, outdoor | Jersey, linen |
| Footed pajamas | Footed pajamas | Sleeping, colder climate | Fleece, flannel |
Frequently Asked Questions
Is a "onesie" the same as a "bodysuit"?
In everyday U.S. usage they’re interchangeable. Retailers may label a slimmer, fashion‑focused version as a bodysuit, but both serve the same snap‑front purpose.
What should I look for when buying a onesie for a newborn?
Choose soft, breathable cotton with a snap‑crotch panel for quick diaper changes. Check the size chart and opt for a slightly larger cut to accommodate growth.
Can I wear a onesie under a sleep sack?
Absolutely. Pairing a lightweight onesie with a fleece sleep sack gives you temperature layering without extra bulk.
Why do some parents prefer the term "baby grow"?
In the UK "baby grow" became popular in the 1970s as a brand name that turned generic. It stuck as a colloquial term for any one‑piece infant garment.
Are there any safety concerns with footed pajamas?
Make sure the footed pajamas fit snugly around the legs and have no loose strings. Follow the American Academy of Pediatrics guidelines for safe sleep.