US to KR Kids' Shoes Size Chart
This chart converts kids' shoes sizes from United States (US) to Korean (KR), 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 korean 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 | KR |
|---|---|
| 1Y | 200 |
| 1.5Y | 205 |
| 2Y | 210 |
| 2.5Y | 215 |
| 3Y | 220 |
| 3.5Y | 225 |
| 4Y | 230 |
| 4.5Y | 235 |
| 5Y | 240 |
| 5.5Y | 245 |
| 6Y | 250 |
| 6.5Y | 255 |
| 7Y | 260 |
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 KR 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.
Korean (KR) shoe sizes are expressed in millimetres of foot length — so a KR 270 means a foot length of 270 mm (27 cm). This system is used across South Korea and is straightforward once you know your foot length. Korean clothing sizes use a mix of S/M/L labels and numbered chest or waist measurements.
Tips for Converting Kids' Shoes Sizes
Korean shoe sizes are in millimetres — a KR 270 means 270 mm (27 cm). To convert from US, find the corresponding centimetre length and multiply by 10.
South Korean shoe shopping sites display KR sizes by default. If you order from platforms like Coupang or Musinsa, use our chart to avoid returns.
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 = KR 200, US 4Y = KR 230, and US 7Y = KR 260. The full chart above covers all 13 sizes in this range.
This kids' data is also available in EU, UK, JP 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 KR?
- Use our US to KR kids' shoes size chart above. Find your US size in the left column and read across to find the KR equivalent. For example, US size 4Y equals KR size 230.
- What is US size 4Y in KR for kids' shoes?
- US size 4Y in kids' shoes is equivalent to KR size 230. This is a standard conversion used across most major brands, though fit can vary slightly between manufacturers.
- Are US and KR kids' shoes sizes the same?
- No, US and KR use different numbering systems for kids' shoes. The numbers do not match directly — for example, US 1Y corresponds to KR 200, not KR 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 (KR 200) to US 7Y (KR 260). 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 KR 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.