Shoe Size Conversion: US UK EU Complete Guide 2026

You found perfect shoes online. They look amazing. But there's a problem. The size says "39." You don't know what that means.

This happens all the time. Shoe sizing confuses everyone. US sizes use numbers like 8 or 10. UK sizes look similar but aren't. European sizes show 38, 40, or 42. It's frustrating.

Good news: shoe size conversion is actually simple. Learn the basic systems. Converting becomes easy. You'll shop with confidence. No more guessing. No more returns.

This guide fixes your sizing problems. We'll explain US, UK, and EU sizing. You'll learn to convert between them. We'll show charts for men and women. Soon you'll know exactly what size to order.

TLDR

US sizes run smaller than UK by 0.5-1 size. European sizes use different numbers based on centimeters. To convert: US to UK, subtract 0.5-1. US to EU, add 30-34. Always check brand charts. Measure your feet. When between sizes, go bigger.

Table of Contents

1. Understanding Different Sizing Systems
2. US Shoe Sizing Explained
3. UK Shoe Sizing Explained
4. European Shoe Sizing Explained
5. Shoe Size Conversion Charts
6. How to Convert Shoe Sizes
7. Measuring Your Feet Correctly
8. Common Sizing Mistakes to Avoid
9. Brand Variations and Fit Differences
10. FAQ
11. Conclusion

Understanding Different Sizing Systems

The world uses three main shoe sizing systems. Each developed separately. This creates confusion when you shop globally.

The Origins of Shoe Sizing

Shoe sizing wasn't always standard. Long ago, shoemakers used different methods. Some used grain measurements. Others traced feet by hand.

Modern systems came with factories. Countries needed consistency. They created national standards. But each country chose differently.

Why Multiple Systems Exist

US sizing came from British methods. But it changed over time. UK sizing kept old measurements. European sizing used centimeters.

These systems never merged. Global trade grew too fast. Now we have multiple systems. Learning them helps you shop anywhere.

The Impact on Shoppers

Different systems cause real problems. You wear size 8 in US shoes. That's size 6 in UK. Or size 39 in Europe. Wrong conversions mean bad fits or returns.

This matters more when shopping online. You can't try shoes first. Getting size right is critical.

US Shoe Sizing Explained

American shoe sizing uses numbers. It looks simple. But it has hidden complexity.

How US Sizing Works

US women's sizes run from 5 to 13. Men's sizes go from 6 to 16. Half sizes exist too (like 8.5 or 10.5). This adds precision.

The Brannock device created this system. This tool became standard in 1927. It measures foot length and width.

Men's vs Women's US Sizing

Here's the tricky part. Men's and women's sizes use same numbers. But they mean different things. A women's 8 is smaller than a men's 8. About 1.5 sizes smaller.

This confuses people. Always say if you need men's or women's. It matters a lot.

Width Sizing in US System

US sizing includes width. Letters show width: B (narrow), D (standard), E (wide). Most shoes come in D width.

Wide and narrow exist but are rare. Width sizing often disappears in international shoes.

UK Shoe Sizing Explained

British shoe sizing looks like US sizing. But don't be fooled. The numbers mean different things.

The Barleycorn Legacy

UK sizing uses old grain measurements. One unit equals 1/3 inch. Sizes go up by these units.

This old system still affects modern UK sizing. It's why UK sizes feel traditional.

UK Size Ranges

UK men's sizes run from 6 to 12. Women's go from 3 to 9. These overlap with US sizing. But they're shifted.

A UK size 8 doesn't equal US size 8. This trips up many shoppers.

Converting Between US and UK

The conversion isn't perfect. UK sizes run about 0.5 to 1 size larger. This varies between men's and women's shoes.

For women: US size minus 2 equals UK size (roughly). For men: US size minus 0.5 equals UK size. Always double-check with charts.

European Shoe Sizing Explained

European sizing looks totally different. Instead of 8 or 10, you see 39 or 43. This confuses people.

The Paris Point System

European sizes use Paris points. One point equals 2/3 centimeter. Sizes measure shoe inside length.

This creates a precise system. It uses actual measurements. Each size goes up by 2/3 cm.

Why European Numbers Are Higher

European sizes use big numbers. Not because shoes are bigger. They just use a different scale.

US women's 8 converts to EU 38-39. US men's 10 becomes EU 43-44. The numbers look random. But they follow a measurement system.

Consistency Across Europe

European sizing has one advantage. It's the same across European countries. France, Germany, Italy, Spain all use it. This makes European shopping easier.

But Italian brands run narrower. German brands fit wider. The numbers stay same. The fit can vary.

Mondopoint as an Alternative

Some European makers use Mondopoint. This measures foot length in millimeters. It's simpler but less common.

Athletic shoes sometimes use it. You'll see sizes like 250 (25.0 cm) or 280 (28.0 cm).

Shoe Size Conversion Charts

Here are the charts you need. Save these for shopping.

Women's Shoe Size Conversion Chart

US Size	UK Size	EU Size	Foot Length (inches)	Foot Length (cm)
5	3	35-36	8.5	21.6
5.5	3.5	36	8.75	22.2
6	4	36-37	8.875	22.5
6.5	4.5	37	9.0625	23.0
7	5	37-38	9.25	23.5
7.5	5.5	38	9.375	23.8
8	6	38-39	9.5	24.1
8.5	6.5	39	9.6875	24.6
9	7	39-40	9.875	25.1
9.5	7.5	40	10	25.4
10	8	40-41	10.1875	25.9
10.5	8.5	41	10.3125	26.2
11	9	41-42	10.5	26.7

Men's Shoe Size Conversion Chart

US Size	UK Size	EU Size	Foot Length (inches)	Foot Length (cm)
6	5.5	38-39	9.25	23.5
6.5	6	39	9.5	24.1
7	6.5	39-40	9.625	24.4
7.5	7	40-41	9.75	24.8
8	7.5	41	9.9375	25.4
8.5	8	41-42	10.125	25.7
9	8.5	42-43	10.25	26.0
9.5	9	43	10.4375	26.7
10	9.5	43-44	10.5625	27.0
10.5	10	44	10.75	27.3
11	10.5	44-45	10.9375	27.9
11.5	11	45	11.125	28.3
12	11.5	45-46	11.25	28.6
13	12.5	47-48	11.5625	29.4

International Shoe Size Conversion Notes

These charts show general conversions. Brands may vary slightly. European sizes show ranges (like 38-39). The conversion isn't exact.

Always measure your feet for best accuracy. Charts guide you. Measurements confirm the right fit.

How to Convert Shoe Sizes

Let's break down conversion step by step. This makes shopping easier.

Converting US to UK Shoe Size

For women's shoes, subtract 2 from your US size. That gives UK size.

US 8 becomes UK 6. US 9 becomes UK 7. This works most times.

For men's shoes, subtract 0.5 from US size. US 10 becomes UK 9.5. US 11 becomes UK 10.5.

These are close estimates. Check brand charts when you can.

Converting US to EU Shoe Size

European conversion needs different math. For women, add 30-31 to US size. US 8 plus 31 equals EU 39.

For men, add 33-34 to US size. US 10 plus 33 equals EU 43.

The exact number varies by brand. Some use 30, others 31 or 32. This is why ranges appear in charts.

Converting UK to US Shoe Size

Working backward? Add 2 to women's UK sizes. UK 6 becomes US 8.

For men, add 0.5 to UK sizes. UK 9.5 becomes US 10.

Converting EU to US Shoe Size

Subtract 30-31 from European women's sizes. EU 39 minus 31 equals US 8.

For men's shoes, subtract 33-34. EU 43 minus 33 equals US 10.

Using Online Shoe Size Converters

Digital tools make conversion faster. Many sites offer converters. You input your size. You get conversions instantly.

These tools are handy. But they're only as good as their data. Check multiple sources for accuracy.

Measuring Your Feet Correctly

Accurate measurement beats any chart. Here's how to measure right.

What You Need

Get these items: paper, pencil, ruler or tape, and a wall. Bring socks if you wear shoes with socks.

The Measurement Process

Put paper on hard floor against a wall. Wear normal socks. Stand on the paper. Put your heel against the wall.

Keep full weight on the foot. Have someone mark your longest toe. If alone, mark it carefully.

Measure from wall to mark. This is your foot length. Do both feet. Most people have different sized feet.

Recording Your Measurements

Write down both measurements. Use the bigger one for shoe sizes. Feet swell during the day. Measure in afternoon or evening.

Convert your measurement using charts above. Match your foot length to the right size.

Width Considerations

Length isn't everything. Width matters too. Measure the widest part of your foot. This shows if you need wide or narrow shoes.

Standard width fits most people. But if shoes feel tight across the top, you might need wide sizing.

The Brannock Device Alternative

Shoe stores use Brannock devices. These measure length, width, and arch at once. Get measured professionally once if you can.

The device gives exact measurements. You can use those for all future buys.

Common Sizing Mistakes to Avoid

Smart shoppers avoid these errors. Learn from others' mistakes.

Assuming All Brands Fit the Same

Brand variation is real. Nike fits different than Adidas. Italian brands fit narrow. American ones fit wider. Never assume sizes are universal.

Always check brand size charts. Read reviews about fit. Other customers help predict your fit.

Ignoring Half Sizes

Half sizes matter more than you think. The gap between 8 and 8.5 seems small. But it affects comfort a lot.

If you're between sizes, half sizes solve the problem. Don't skip them.

Forgetting About Sock Thickness

Thick socks need more room. Athletic socks differ from dress socks. Think about what you'll wear with the shoes.

Order winter boots bigger for thick socks. Summer sandals need less space.

Relying Only on Conversion Charts

Charts guide you. But they're not perfect. Brands interpret sizes differently.

Use charts as starting points. Add foot measurements and brand guidance for best results.

Not Reading Customer Reviews

Reviews reveal fit secrets. Customers say if shoes run large, small, narrow, or wide. This info is gold for online shopping.

Look for reviewers with similar feet. Their experiences predict your fit better than charts.

Brand Variations and Fit Differences

Understanding brand tendencies helps you shop smarter. Here's what to know.

Athletic Shoe Brands

Nike tends to run narrow. Adidas offers more width. New Balance makes wide options. Asics fits true to size for most.

Athletic brands use performance fits. Running shoes might fit tighter than casual sneakers. Think about the shoe's purpose when sizing.

Fashion Brands

European fashion brands run narrow. Italian shoes fit especially sleek. French brands vary but lean narrow.

American fashion brands offer more room. They account for wider feet on average.

Work and Safety Footwear

Work boots often run large. Makers assume thick socks and all-day wear. Many people go down half a size in work boots.

Safety features add bulk. Steel toes need more room. Check specific maker guidelines for work shoes.

Specialty Shoes

Climbing shoes fit very tight on purpose. Cycling shoes run small. Running shoes need space at the toe.

Each shoe type has specific fit needs. Research the sport before ordering specialty shoes.

FAQ

What size shoe is a 38 in US?

European size 38 is US women's 7-7.5. For men's shoes, EU 38 equals US 5.5-6. The exact conversion depends on the brand. It also depends on if it's men's or women's.

Always check the brand's size chart. Some makers interpret EU 38 differently. When unsure, measure your foot in centimeters. Compare to the brand's measurements.

What is EU size 40 in US?

EU size 40 is US women's 9-9.5. For men's shoes, EU 40 equals US 7-7.5. European size 40 means a foot length of about 25-25.5 cm.

This varies between brands. Some run bigger or smaller. The shoe gender matters a lot. Always confirm if you're looking at men's or women's sizing.

How do I convert US to UK shoe size?

For women, subtract 2 from your US size. US women's 8 becomes UK 6. For men, subtract 0.5 from your US size. US men's 10 becomes UK 9.5.

These formulas work for most conversions. But variations exist between brands. Some British brands use slightly different scales. Always check the maker's size chart before buying.

Are EU shoe sizes bigger than US?

EU sizes use bigger numbers. But that doesn't mean shoes are bigger. European sizing uses a different system. It measures in Paris points.

US size 8 equals EU 38-39. The actual shoe length is the same. Only the numbers differ. Think of it like Celsius vs Fahrenheit. Different numbers, same measurement.

How to measure shoe size at home?

Stand on paper with heel against a wall. Wear normal socks. Mark your longest toe. Measure from wall to mark in centimeters or inches.

Do both feet. Use the bigger measurement. Compare to size charts. Match your foot length to the right size. Measure in the evening when feet are swollen.

Professional fitting with a Brannock device is even better. But home measuring works well too.

What if I am between shoe sizes?

Go up rather than down. Slightly loose shoes can be fixed. Use insoles or thicker socks. Tight shoes cause pain and foot problems.

Half sizes solve most between-size issues. If half sizes aren't available, choose the bigger size. Use heel grips or insoles to adjust fit. For athletic shoes, extra room is better than tight fit.

Do shoe sizes vary by brand?

Yes, a lot. Nike runs narrow and sometimes small. New Balance offers wide widths. Italian brands fit slim. American brands run wider.

Even in one country, brands differ. Manufacturing, target customers, and design affect fit. Always read brand reviews and size charts. What fits perfectly in one brand might be tight or loose in another.

How to find the right shoe size when shopping online?

Start by measuring both feet accurately. Check the specific brand's size chart. Don't rely on general conversions. Read customer reviews for fit feedback.

Look for detailed product descriptions. They often mention fit characteristics. Order from stores with free returns when possible. This lets you try multiple sizes. Save your measurements and sizes from different brands for future use.

What is my shoe size in European measurements?

Measure your foot length in centimeters. Compare this to European size charts. The charts show foot length alongside EU sizes.

For quick conversion without measuring: Women add 30-31 to US size. Men add 33-34. US 8 becomes EU 38-39 for women. US 10 becomes EU 43-44 for men.

But measuring your foot is more accurate. Different European brands may vary. Always check specific brand charts.

How do children's shoe sizes convert internationally?

Children's sizing is more complex than adult sizing. US uses C (child) and Y (youth) labels. UK uses one continuous scale from infant through youth. European sizing continues the Paris point system.

Children's feet grow fast. Precise measurement matters more than charts. Always measure the child's foot. Compare to the brand's children's chart.

Age-based sizing is unreliable. Children's feet grow at different rates. Measure often for growing kids.

Conclusion

Shoe size conversion doesn't have to confuse you. Now you understand the three main systems. You know how to convert between them. You can measure your feet right.

Remember the basics: US to UK, subtract 0.5-2. US to EU, add 30-34. But always measure your feet. Always check brand charts. These give you the best sizing.

Different brands fit differently. Italian shoes run narrow. Athletic brands vary a lot. Read reviews. Check return policies. When between sizes, go bigger.

WayUP Sports makes shopping easier with clear sizing guidance. Whether you're shopping US, UK, or European brands, our detailed size charts help you find perfect fits.

Stop guessing at shoe sizes. Use this guide. Measure your feet. Check the charts. Order with confidence. Your feet will thank you.