US to UK Kids' Shoes Size Chart
This chart converts kids' shoes sizes from United States (US) to United Kingdom (UK), covering 13 sizes from US 1Y to US 7Y. Each row shows the direct equivalent so you can find your size at a glance.
Whether you are shopping online from a united kingdom retailer or trying to interpret a foreign size label, this conversion chart gives you the mapping you need. The conversions below follow industry-standard sizing used by major brands, though individual brands may vary slightly.
Quick Converter
| US | UK |
|---|---|
| 1Y | 13 |
| 1.5Y | 14 |
| 2Y | 1 |
| 2.5Y | 1.5 |
| 3Y | 2 |
| 3.5Y | 2.5 |
| 4Y | 3 |
| 4.5Y | 3.5 |
| 5Y | 4 |
| 5.5Y | 4.5 |
| 6Y | 5 |
| 6.5Y | 5.5 |
| 7Y | 6 |
How to Measure Your Shoes Size
Stand on a piece of paper with your heel against a wall. Mark the tip of your longest toe, then measure the distance from the wall to the mark in centimetres. Measure both feet — most people have one foot slightly larger — and use the longer measurement. Measure at the end of the day when feet are at their largest. This length maps directly to JP sizes and can be converted to any other system with our chart.
Understanding US and UK Sizing
The US sizing system is the standard in the United States and is used by most American brands. US sizes are typically numbered and can differ significantly from European or Asian systems. Most US retailers display sizes prominently on labels and online, but the underlying measurements (in inches or centimetres) vary between brands, so treating US sizes as approximate is safest.
UK sizes use the British sizing system, which is closely related to US sizing but offset by roughly half a size for footwear and one or two sizes for clothing. UK sizing is used throughout the United Kingdom, Ireland, and many Commonwealth countries. Historically rooted in the barleycorn system (each size = 8.47 mm), UK shoe sizes still follow that progression today.
Tips for Converting Kids' Shoes Sizes
US and UK men's shoe sizes are offset by roughly 0.5 — a US 10 is typically a UK 9.5. Women's sizes differ by about 2 full sizes between the two systems.
When ordering from UK-based retailers like ASOS or Clarks, make sure the site is displaying UK sizes, not US. Many international sites let you toggle between systems.
Sizes vary between brands — a US 10 in Nike may fit differently than a US 10 in Adidas. Always check the brand's own chart when buying online.
If you are between sizes, size up for athletic shoes (you need room for swelling during exercise) and consider sizing down for formal shoes (leather stretches over time).
Width matters as much as length. Some brands offer wide (W) and narrow (N) options. If standard-width shoes feel tight across the ball of your foot, try a wide version rather than going up a full size.
Quick Reference
Quick reference: US 1Y = UK 13, US 4Y = UK 3, and US 7Y = UK 6. The full chart above covers all 13 sizes in this range.
This kids' data is also available in EU, JP, KR sizing. Use the converter tool above to switch between any pair of systems instantly.
Frequently Asked Questions
- How do I convert US kids' shoes sizes to UK?
- Use our US to UK kids' shoes size chart above. Find your US size in the left column and read across to find the UK equivalent. For example, US size 4Y equals UK size 3.
- What is US size 4Y in UK for kids' shoes?
- US size 4Y in kids' shoes is equivalent to UK size 3. This is a standard conversion used across most major brands, though fit can vary slightly between manufacturers.
- Are US and UK kids' shoes sizes the same?
- No, US and UK use different numbering systems for kids' shoes. The numbers do not match directly — for example, US 1Y corresponds to UK 13, not UK 1Y. Always use a conversion chart rather than assuming the sizes are equivalent.
- What size range does this kids' chart cover?
- This chart covers 13 sizes, from US 1Y (UK 13) to US 7Y (UK 6). Click any size in the chart for a detailed individual conversion page.
- How accurate are these kids' shoes size conversions?
- These conversions follow the industry-standard mapping used by major brands and international sizing organisations. However, individual brands may size slightly differently — a US 4Y in one brand might fit like a US 3.5Y in another. When possible, check the specific brand's size chart.
- What if I am between two kids' shoes sizes?
- If you fall between two sizes, the general advice is to size up for comfort, especially for athletic or walking shoes. You can also check whether the brand offers half sizes or fits that run large or small.
- Can I use this chart for all kids' brands?
- This chart provides the standard US to UK conversion for kids' shoes. Most mainstream brands follow this sizing closely, but some brands are known to run large or small. If accuracy is critical — for example, when ordering online with no option to try on — check the brand's own size chart alongside our conversion.