UK to US Kids Clothing Size Converter – Babygrows, Tops & More
👶 UK to US Kids’ Clothing Size Converter
Select age and clothing type to find the US equivalent size.
Quick Tip: Measure from top of head to heel for height.
Navigating kids’ clothing sizes between the UK and US? Congrats—you’ve just entered the fashion version of an escape room.
Whether you’re shopping for babygrows in the UK or onesies in the US, this converter helps you translate every term and size—from newborn to tween—so you don’t end up with a hoodie that fits like a crop top (been there, done that).
🧠 Why Kids’ Clothing Size Conversion Matters
UK and US sizing systems might as well be in different galaxies:
- UK sizing: Based on age or height in cm (e.g., 3–4 years, 104 cm)
- US sizing: Uses age-based labels like 2T, 7, or XS
Ordering the wrong size = returning clothes + one very cranky toddler. 😅
This converter includes:
- Precise UK↔US kids’ clothing size conversions
- Support for newborns to age 13+
- Fun extras like why toddlers are obsessed with hoodies
🍼 Newborn & Baby Clothing Size Chart (0–12 Months)
| UK Size | US Size | Height (cm) | What It’s Perfect For |
|---|---|---|---|
| Newborn | NB | Up to 50 | Babygrows, sleepsuits |
| 0–3 Months | 0–3M | 50–62 | Onesies, rompers |
| 3–6 Months | 3–6M | 62–68 | Vests, pramsuits |
| 6–9 Months | 6–9M | 68–74 | Crawlers in dungarees |
| 9–12 Months | 9–12M | 74–80 | Cardigans, nappy covers |
🚼 Toddler Clothing Size Chart (1–3 Years)
| UK Size | US Size | Height (cm) | Toddler Go-To Gear |
|---|---|---|---|
| 12–18 Months | 12–18M | 80–86 | Joggers for freedom |
| 18–24 Months | 18–24M | 86–92 | Hoodies are toddler besties |
| 2–3 Years | 2T | 92–98 | Wellies = puddle stomping champs |
🧒 Kids’ Clothing Size Chart (4–12 Years)
| UK Size | US Size | Height (cm) | Wardrobe Must-Haves |
|---|---|---|---|
| 3–4 Years | 3T | 98–104 | Birthday party dresses |
| 4–5 Years | 4T | 104–110 | School uniforms |
| 5–6 Years | 5 | 110–116 | PE kits for sporty kiddos |
| 6–7 Years | 6 | 116–122 | Cozy school hoodies |
| 7–8 Years | 7 | 122–128 | Rain-ready wellies |
| 8–9 Years | 8 | 128–134 | Fancy dress adventures |
| 9–10 Years | 10 | 134–140 | Tracksuits for action |
| 10–11 Years | 12 | 140–146 | Waterproof raincoats |
| 11–12 Years | 14 | 146–152 | Preppy cardigans |
🎩 Accessories & Extras Size Chart
| UK Term | US Term | What It Is | UK to US Size |
|---|---|---|---|
| Dummy | Pacifier | That thing they drop 4,000 times a day. | NB–18M (0–6M, 6–18M typically) |
| Nappy | Diaper | UK = Nappy change. US = Diaper change. | Size 0–6 (birth to 35+ lbs) |
| Tights | Tights | Worn under dresses, especially in colder months. | UK 0–3M to 12Y → US NB–14 |
| Babygro Mitts | Mittens | Prevents baby from scratching themselves. | NB–6M (one-size in both regions) |
| Sun Hat | Sun Hat | Bucket hats, wide-brimmed—anything SPF-ready. | UK NB–12Y → US NB–14 (S, M, L) |
| Booties | Booties | Soft baby shoes. Fashion > function. | UK 0–6M → US 0–3, 3–6M |
🛠 How to Use the Converter
Your parenting brain is already overloaded—so we kept this simple:
- Select Age: e.g., 3–6 months, 7–8 years
- Add Height/Weight (Optional): More accurate if you know them (e.g., 86 cm, 12 kg)
- Choose Unit: cm/kg or inches/lb
- Pick Gender: Boy, girl, or unisex
- Select Clothing Type: Tops, dresses, outerwear, etc.
- Choose Fit Style: True to size, roomy, or snug
- Select Brand (Optional): M&S, Next, Primark, etc.
- View Results: We’ll show the exact US or UK equivalent + a fun fact
✅ Example Outputs:
- UK 3–6 months → US 3–6M = Ideal for rompers
- UK 7–8 years → US 7 = Perfect for school hoodies
- US 2T → UK 2–3 years = Great for wellies
🧵 Types of UK vs. US Kids’ Clothing (with Translations!)
| UK Term | US Term | What It Actually Is |
|---|---|---|
| Babygrow / Sleepsuit | Onesie / Footie Pajamas | One-piece sleepwear with feet |
| Vest (baby) | Onesie / Bodysuit | Snaps at the crotch—worn under clothes |
| Pramsuit | Snowsuit | Padded outerwear for baby strolls |
| Dungarees | Overalls | Denim or cotton with shoulder straps |
| Jumper | Sweater | Pullover, not someone jumping |
| Mac / Raincoat | Rain Jacket | Waterproof coat |
| Pants | Underwear (UK) / Trousers (US) | UK: “pants” = underwear; US: “pants” = trousers |
| Wellies | Rain Boots | Must-have for muddy puddle missions |
| Fancy Dress | Costume | NOT formalwear—think pirates or princesses |
| Trainers | Sneakers | Sporty shoes, often Velcro for little ones |
🧩 Tips for Finding the Perfect Fit
- Room to Grow: Always size up for outerwear or growth spurts
- Measure Smart: Head-to-heel height = most accurate size
- Think Seasonally: Size up for UK winter layers
- Know Your Brand: M&S vs. Primark can differ by a full size
- Fit = Function: Babygrows should be snug; jackets need wiggle room
- Girls’ Dresses: UK versions often have a narrower cut
- Bonus Tip: US 2T = UK 2–3 years, aka the “I dress myself now” phase 😅
Why Choose Our Converter
Our UK to US kids’ clothing size converter stands out with:
- Comprehensive Options: Supports newborns to teens, multiple clothing types, and brands like Next and M&S.
- Engaging Facts: Learn fun insights, like why UK 2T-3 years suits playground trainers.
- Social Sharing: Share on Facebook, X, X, Pinterest, or Instagram.
- Website Embedding: Add the converter to your site with an iframe for easy access.
Explore parenting tips at BabyCentre.
🙋♀️ Frequently Asked Questions
UK sizes are often age- or height-based (e.g., 3-4 years, 104 cm), while US sizes use labels like 2T or 7 (e.g., UK 7-8 years to US 7).
UK 3-6 months to US converts to US 3-6M, perfect for rompers and onesies.
US to UK kids’ clothing size for US 2T converts to UK 2-3 years, great for joggers.
UK 9-10 years to US converts to US 10, ideal for sports tracksuits.
Yes, our tool works both ways. For example, US to UK for US 5 is UK 5-6 years.
UK 18-24 months to US converts to US 18-24M, suited for toddler hoodies.
To measure UK kids’ clothing size, measure height from head to heel and check age/height charts. See What to Expect.
UK 4-5 years to US converts to US 4T, perfect for school uniforms.
UK newborn to US converts to US NB, ideal for babygrows and sleepsuits.
Choose room to grow for outerwear, snug fit for vests, or true to size for tops. Check brand guides for variations.
👪 Shop Smarter for Your Kids
Whether you’re hunting for babygrows in the UK or cardigans in the US, our converter takes the mystery out of kids’ clothing sizes.
👟 Convert UK to US
🧢 Convert US to UK
👗 Avoid toddler meltdowns (at least about clothes)
Want a printable cheat sheet or size chart PDF? Drop a comment below or share this tool with your fellow sleep-deprived, online-shopping parent friends. 🙌
Let me know if you’d like this formatted for WordPress, JSON-LD schema, or turned into a Pinterest-friendly infographic!