How kids and baby clothing sizes work
Children's clothing labels mix age, height, and regional conventions. Baby sizes often use months, toddler sizes use 2T and 3T in the US, European labels often follow height in centimeters, and UK labels commonly use age ranges.
This converter estimates a starting size from age, height, or weight and shows the matching US, EU, and UK labels side by side. It is most useful before opening a brand chart, not instead of one.
- Age is fast when the child is close to average proportions.
- Height is usually the best clothing signal for tops, dresses, and full outfits.
- Weight helps with baby and toddler sizing, especially when fit around the body matters.
Choosing the best input
Use age for a quick estimate
Age works well for common baby and kids labels, but children can be taller, shorter, lighter, or broader than the chart average.
Use height for clothing length
Height is the better signal when sleeves, pant length, dress length, or overall garment length matter.
Use weight as a fit check
Weight can help with baby bodysuits, pajamas, and stretchy garments, but it should not be the only signal for older kids.
US, EU, and UK label comparison
| Stage | Typical age | US label | EU label | UK label |
|---|---|---|---|---|
| Baby | 0-24 months | N, 3M, 6M, 12M, 18M, 24M | 50-86 | 0-3M to 18-24M |
| Toddler | 2-3 years | 2T, 3T | 92-98 | 2-3Y, 3-4Y |
| Kids | 4-10 years | 4-10 | 104-140 | 4-5Y to 10-11Y |
| Older kids | 12-16 years | 12-16 | 152-176 | 12-13Y to 15-16Y |
Before ordering online
- Measure height before seasonal purchases; kids can outgrow old assumptions quickly.
- Compare the converter result with the brand's height and weight chart.
- Check whether the item is slim, regular, relaxed, or meant to fit over layers.
- For pajamas and babywear, check safety and snug-fit notes on the product page.
- When between sizes, consider growth room only if it does not make the garment unsafe or awkward.
Frequently Asked Questions
Is age or height better for kids clothing size?
Height is usually more reliable for clothing length and overall fit. Age is useful for a quick estimate when no measurements are available.
What does 2T mean?
2T is a US toddler label, usually around age two. It often overlaps with 24-36 months and EU 92, but brands can vary.
Why do EU kids sizes look like numbers such as 104 or 116?
EU children's clothing labels often follow approximate child height in centimeters, so 104 roughly means a child around 104 cm tall.
Should I size up for growth?
A small amount of room is practical, but avoid sizing up so much that sleeves, hems, or waistbands become uncomfortable or unsafe.
How accurate is the converter?
It is a chart-based starting point. Brand charts, child proportions, fabric stretch, and garment cut can change the best size.