Kids Clothing Size Converter

Convert kids clothing sizes between US, EU, UK, age, and height references with a clear size chart.

Last updatedHow we build & check our tools

Use the closest US label from the tag or store size chart.

Typical age
6 years
EU size
116
UK size
6-7Y
Height
111-116 cm

Kids Clothing Size Chart

Children's clothing sizes vary by brand. Use height first when a retailer provides measurements.

US sizeTypical ageEU sizeUK sizeHeight
Newborn0-3 months560-3MUp to 56 cm
3M3-6 months623-6M57-62 cm
6M6-9 months686-9M63-68 cm
9M9-12 months749-12M69-74 cm
12M12-18 months8012-18M75-80 cm
18M18-24 months8618-24M81-86 cm
2T2 years922-3Y87-92 cm
3T3 years983-4Y93-98 cm
4T/44 years1044-5Y99-104 cm
55 years1105-6Y105-110 cm
66 years1166-7Y111-116 cm
77 years1227-8Y117-122 cm
88 years1288-9Y123-128 cm
9/109-10 years134-1409-11Y129-140 cm
10/1211-12 years146-15211-13Y141-152 cm
14/1613-14 years158-16413-15Y153-164 cm

How This Tool Works

Sizing kids' clothes is notoriously tricky because different brands, countries, and even seasons use wildly varying standards. Our converter solves this complexity by acting as a universal sizing translator.

When you input a size—for example, 5T (five years) or UK Size 9—our system cross-references multiple international and brand charts simultaneously. It doesn't just guess; it uses established garment measurements to provide the most accurate equivalent size range.

This process accounts for common discrepancies, such as the difference between age-based sizing (e.g., 3Y) and measurement-based sizing (which relies on height or weight). By giving you a clear explanation alongside the conversion, we ensure you understand what each resulting size means in real-world measurements.

  • Input: Enter the known size (e.g., '2T').
  • Process: We cross-reference US, UK, and EU standards.
  • Output: You receive comparable sizes for multiple brands to help you shop confidently.

Why This Matters

Accurate size conversion is crucial when shopping for children’s clothing because kids grow incredibly fast. A difference of just a half-size can mean the difference between clothes fitting perfectly and items being too restrictive or simply falling off.

Using this tool saves you time, money, and the frustration of returns. Instead of relying solely on printed size tags—which are often misleading—you gain a comprehensive view of fit across major retail standards.

For example, if you need an outfit that spans multiple brands (say, a pair of pants from Brand A and a shirt from Brand B), the converter ensures both pieces will fit your child's current measurements without guesswork. This level of accuracy allows for seamless shopping experiences, no matter where you are buying.

  • Saves Money: Reduces the likelihood of purchasing items that don't fit.
  • Reduces Stress: Eliminates the guesswork associated with international shopping.
  • Ensures Comfort: Guarantees clothing accommodates active play, from playground swings to naptime crawling.

Common Mistakes to Avoid

The most common mistake shoppers make is assuming that size is dictated purely by age. A child who is 3 years old can vary greatly in height and build, meaning a '3Y' item might fit perfectly one day and be too small the next.

Never rely on just one single sizing reference (e.g., only looking at the US chart). Always cross-reference with other standards provided by our tool to get a complete picture of potential fit inconsistencies between brands.

Another mistake is ignoring garment type. A size appropriate for a stretchy t-shirt might be too loose or gaping when applied to structured items like jackets or jeans. Always consider the garment's material and intended use when making your final sizing decision.

  • Don't Trust Age Alone: Use measurements (height, waist) first.
  • Check Fabric Type: Account for stretch vs. rigid materials.
  • Compare Brands: Treat each size conversion as a separate data point.

Tips for Best Results

To get the most accurate and helpful results from this tool, always try to gather as much information as possible before converting. If you have access to a child's actual measurements (height in inches/cm or waist circumference), keep those handy.

If you are buying an item that needs to fit *right now* but also needs room for growth, look at the conversion chart and choose a size that offers about 1–2 inches of comfortable wiggle room. This is especially true for outerwear.

Finally, use this converter as an excellent starting point, not the final word. After getting the converted sizes (e.g., '3Y' to '9UK'), always check the specific brand's size chart linked on their website for a physical measurement comparison before clicking 'Add to Cart.' This combination of tools provides maximum confidence.

  • Measure First: Use actual body measurements if available.
  • Plan Ahead: Convert sizes for outfits, not just single items.
  • Verify Locally: Always compare our results against the brand's own size guide.

Frequently Asked Questions

Common questions about the Kids Clothing Size Converter

Both. Age is a rough guide, but height and weight determine actual size.