Understanding shoe size conversions is important when buying footwear from international brands. European sizing is widely used across many countries, but if you’re shopping in the United States, you’ll need to know the equivalent US size.
In general, EU size 40 equals a US men’s size 7 and a US women’s size 9. However, sizing can vary slightly between brands and shoe styles. This guide explains the conversion, how to measure your feet correctly, and tips for finding the best fit.
EU Size 40 to US Shoe Size Chart
| European (EU) | US Men’s | US Women’s | UK |
|---|---|---|---|
| 40 | 7 | 9 | 6.5 |
Note: Shoe sizes may differ slightly depending on the manufacturer. Always check the brand’s official size chart before purchasing.
What is a Size 40 Shoe in US Size?
A European size 40 typically converts to:
- US Men’s: Size 7
- US Women’s: Size 9
Although this conversion is widely accepted, brands may have small differences in sizing. Athletic shoes, dress shoes, boots, and casual sneakers can all fit differently even if they share the same size number.
If you’re between sizes, consider both your foot width and the type of socks you’ll wear before choosing a size.
How to Convert EU to US Shoe Sizes
European shoe sizes use a different sizing system than US footwear. Instead of relying on inches, EU sizes follow a standardized numbering system.
A simple conversion for EU 40 is:
- EU 40 = US Men’s 7
- EU 40 = US Women’s 9
If you’re shopping online, compare your measurements with the brand’s sizing guide instead of relying only on the conversion.
How to Measure Your Foot for the Perfect Fit
Accurate measurements help you choose the correct shoe size.
Step 1: Prepare Your Materials
You’ll need:
- A sheet of paper
- A pencil
- A ruler or measuring tape
Step 2: Trace Your Foot
Stand on the paper with your weight evenly distributed and trace around your foot.
Step 3: Measure the Length
Measure from the back of your heel to the tip of your longest toe.
Step 4: Measure the Width
Measure across the widest part of your foot.
For the most accurate results, measure both feet in the afternoon or evening, as feet naturally expand throughout the day. Use the larger measurement if one foot is slightly bigger than the other.
Brand Differences for Size 40 Shoes
Although EU sizing is fairly consistent, brands may have slight variations in fit.
For example:
- Some athletic brands offer a snug fit designed for sports.
- Casual shoes may fit more generously.
- Dress shoes often have a narrower shape than sneakers.
Because of these differences, it’s always helpful to review the manufacturer’s sizing guide and customer reviews before ordering.
Tips for Buying Shoes Online
Shopping online can be convenient, but choosing the correct size requires extra attention.
Here are a few tips:
- Measure your feet before ordering.
- Compare your measurements with the brand’s size chart.
- Read customer reviews for sizing feedback.
- Check whether the shoes run small, large, or true to size.
- Review the store’s return and exchange policy before purchasing.
Taking these steps can help reduce the chances of ordering the wrong size.
Common Shoe Size Conversion Mistakes
Avoid these common errors when converting shoe sizes:
- Assuming every brand fits the same.
- Ignoring foot width when selecting a size.
- Measuring only one foot.
- Measuring feet early in the morning when they’re at their smallest.
- Buying based only on your previous shoe size instead of checking the current size chart.
A few extra minutes spent measuring can help you find a more comfortable fit.
Conclusion
A European size 40 generally corresponds to a US men’s size 7 or a US women’s size 9. While this conversion works for most brands, shoe sizing isn’t always identical across manufacturers. Measuring your feet accurately and checking the brand’s sizing guide are the best ways to ensure a comfortable fit.
Whether you’re shopping for athletic shoes, casual sneakers, boots, or dress shoes, understanding international size conversions can help you buy with greater confidence.
FAQs
Is EU size 40 the same for men’s and women’s shoes?
No. A European size 40 typically converts to a US men’s size 7 and a US women’s size 9.
What foot length fits an EU size 40?
Most manufacturers design an EU size 40 for a foot length of approximately 25 to 25.5 cm (9.8–10 inches). However, this may vary slightly by brand.
Does Nike size 40 match Adidas size 40?
Both brands use EU sizing, but the fit can differ due to shoe design and construction. It’s always best to check each brand’s official size chart.
What if I’m between two shoe sizes?
If you’re between sizes, consider your foot width and the type of shoe. Athletic shoes often benefit from a little extra room, while dress shoes may fit better with a closer fit.
Are EU shoe sizes more consistent than US sizes?
Generally, EU sizing is more standardized, but slight differences still exist between manufacturers and shoe styles.
Should I size up if I have wide feet?
Many people with wide feet find that going up half a size or choosing a wide-width version provides a more comfortable fit. Always check the brand’s fit recommendations.
Can shoe size change over time?
Yes. Age, pregnancy, weight changes, and certain medical conditions can affect foot size and shape. Measuring your feet periodically helps ensure you’re wearing the correct size.
Why do shoes in the same size fit differently?
Differences in shoe shape, materials, construction, and intended use can all affect how a shoe fits, even when the size label is the same.