Introduction
chinese shoe size to us from Chinese retailers like Shein, Temu, or AliExpress, or picking up a pair while traveling in China, can quickly turn confusing once you see the size labeled “CN 40” or “CN 250” instead of a familiar US number. Chinese shoe sizing uses a different system altogether, and getting the conversion wrong often means dealing with returns or an uncomfortable fit.
This guide breaks down how chinese shoe size to us sizing actually works and gives you a reliable way to convert it to US sizes.
Why Chinese Shoe Sizes Look So Different
Unlike the US system, which uses somewhat arbitrary size numbers, chinese shoe size to us sizing is based directly on foot length measurement. That said, you may come across two different labeling styles when shopping from Chinese sellers:
- Formula-based CN sizing: A two-digit number (like 38, 39, 40) calculated using the formula: Chinese Size = (Foot Length in cm × 2) − 10. This style closely resembles EU sizing and is common on Chinese fashion platforms.
- Millimeter-based CN sizing: A three-digit number (like 220, 245, 265) representing your foot length directly in millimeters. This style is more common on athletic and specialized footwear.
Because both formats exist, it’s worth checking which style a specific listing is using before assuming a conversion. When in doubt, your actual foot length in centimeters is always the most reliable starting point.
Quick Facts Table
| Sizing Style | Format | Example |
|---|---|---|
| Formula-based CN | Two-digit, EU-style | CN 40 |
| Millimeter-based CN | Three-digit, foot length in mm | CN 250 |
| Most Reliable Anchor | Foot length in centimeters | 25.0 cm |
How to Measure Your Foot for an Accurate Conversion
Before relying on any conversion chart, measuring your foot directly will give you the most accurate result:
- Place a piece of paper on a hard floor, against a wall
- Stand on the paper with your heel touching the wall
- Mark the tip of your longest toe on the paper
- Measure the distance from the wall edge to your mark, in centimeters
- Repeat for both feet, and use the larger measurement
Measuring both feet matters, since it’s common for one foot to be slightly larger than the other.
chinese shoe size to us Size to US Conversion Chart
The chart below uses foot length in centimeters as the anchor point, since this is the most reliable way to compare chinese shoe size to us sizing across different brands and platforms.
| Foot Length (cm) | Chinese Size (Formula) | US Men’s Size | US Women’s Size |
|---|---|---|---|
| 22.0 | 34 | 4 | 5.5 |
| 22.5 | 35 | 4.5 | 6 |
| 23.0 | 36 | 5.5 | 7 |
| 23.5 | 37 | 6 | 7.5 |
| 24.0 | 38 | 6.5 | 8 |
| 24.5 | 39 | 7.5 | 9 |
| 25.0 | 40 | 8 | 9.5 |
| 25.5 | 41 | 8.5 | 10 |
| 26.0 | 42 | 9 | 10.5 |
| 26.5 | 42–43 | 9.5 | 11 |
| 27.0 | 43 | 10 | 11.5 |
| 27.5 | 44 | 10.5 | 12 |
| 28.0 | 44–45 | 11 | 12.5 |
| 28.5 | 45 | 11.5 | 13 |
| 29.0 | 46 | 12 | 13.5 |
This chart offers a reliable general guide, though it’s always worth checking a specific brand’s own size chart when available, since fit can vary based on shoe style and last shape.
Converting Millimeter-Based chinese shoe size to us
If you come across a chinese shoe size to us labeled in millimeters, such as CN 250, the conversion is simpler since the number already reflects your foot length directly.
- CN 220 = 22.0 cm foot length
- CN 245 = 24.5 cm foot length
- CN 265 = 26.5 cm foot length
Once you know your foot length in centimeters from a millimeter-based CN size, you can cross-reference it against the chart above to find your approximate US size.
Men’s vs. Women’s Sizing Differences
Since US shoe sizes differ by gender for the same foot length, it’s important to select the correct category when shopping. As a general rule of thumb:
- US Women’s Size ≈ US Men’s Size + 1.5
- US Men’s Size ≈ US Women’s Size − 1.5
This means a foot length that corresponds to a US men’s size 9 would typically align with a US women’s size 10.5, even though the actual foot length is identical.
Tips for Getting the Right Fit When Buying From chinese shoe size to us
- Always measure your foot length in centimeters rather than relying solely on your usual US size number
- Check whether the listing uses formula-based or millimeter-based CN sizing, since mixing them up can lead to a significant sizing error
- Read the specific brand or seller’s size chart, especially on marketplaces like Shein, Temu, or AliExpress, where sizing can vary between different sellers
- Consider sizing up slightly, since some Chinese footwear brands are known to run narrow or slightly small
- Check reviews for sizing feedback, since other buyers often mention whether an item ran large, small, or true to size
Why Accurate Shoe Size Conversion Matters
Getting your chinese shoe size to us conversion right offers real practical benefits:
- Fewer returns and exchanges, saving time and shipping costs
- A more comfortable fit, especially important for athletic or everyday footwear
- More confident online shopping, particularly when buying from international marketplaces
- Easier travel shopping, if you’re purchasing shoes while visiting China
FAQs About Chinese Shoe Size to US Conversion
1. How do I convert a chinese shoe size to us size? Measure your foot length in centimeters, then use a conversion chart to find your corresponding US men’s or women’s size, since foot length is the most reliable common reference point.
2. Why do some chinese shoe size to us have three digits? Some Chinese sizing, especially for athletic shoes, uses a millimeter-based system where the number directly reflects your foot length, for example, CN 250 means a 25.0 cm foot.
3. Is chinese shoe size to us sizing the same as EU sizing? They’re often very similar, since the common Chinese formula-based sizing (foot length in cm × 2, minus 10) frequently produces numbers close to EU sizing, though it’s not always identical.
4. Do chinese shoe size to us run small? Some Chinese brands and sellers do run narrow or slightly small, so many buyers recommend sizing up half a size, though this varies by brand.
5. What’s the most accurate way to find my size when shopping from China? Measuring your actual foot length in centimeters and comparing it against a conversion chart is more reliable than converting directly from your usual US shoe size number.
Conclusion
Converting Chinese shoe sizes to US sizes doesn’t have to be confusing once you understand the two different sizing formats and know how to measure your foot accurately. By using foot length in centimeters as your anchor point and cross-checking with a reliable conversion chart, you can shop confidently from Chinese retailers or during travel, without the guesswork.
Whenever possible, pair this guide with the specific brand’s own size chart for the most accurate, comfortable fit.
