Nike
MenTrue to sizeWomenRuns smallKidsTrue to size
Recommended: Size up ½
Wide-foot styles available
Shoe Size Converter
Convert any shoe size in seconds. Covers US, UK, EU, AU, JP, KR, CN, MX + width and foot length.
Pick the system you already know, enter your size, and read the equivalent across every other system at once — anchored to your foot length in centimetres, with fit notes for major brands. Free, instant, and no sign-up.
Convert Between Any Shoe Size System
| System | US / CA | UK | EU | AU | JP (cm) | KR (mm) | CN | MX | Foot (cm) | Foot (in) |
|---|---|---|---|---|---|---|---|---|---|---|
| Select a size above to see equivalents | ||||||||||
Sizes are approximate and may vary by brand. Check the manufacturer's size chart before buying.
How to use the shoe size converter
Choose the gender tab, select whichever system you already know — US, UK, EU, Australian, Japanese, Korean, Chinese or Mexican — and enter your size. The converter instantly returns the matching size in every other system, plus your foot length in centimetres and a width reference, all on one screen. Don't know any of your sizes? Switch to the foot-length input and measure instead. Your selection is saved in the page URL, so you can bookmark a conversion or send it to someone and it opens exactly as you left it.
Why shoe sizes differ between countries
There has never been a single global sizing standard, so each region measures feet its own way. The US and UK scales both descend from the old English "barleycorn" system (one size = ⅓ inch), but they sit about half a size apart and split into separate men's and women's numbering. Continental Europe uses Paris points, where each full size is two-thirds of a centimetre — which is why a US half-size often falls between two EU numbers and gets written as a range like "38–39". Japan and Korea skip the abstraction entirely and label shoes by actual foot length: centimetres in Japan, millimetres in Korea. On top of all that, every brand builds shoes on its own last, so two identical labels can still fit differently.
Foot length is the measurement that always works
Because national sizes disagree, the dependable common denominator is the length of your foot in centimetres. Every row in our tables is anchored to it, so once you know your foot length you can read across to any system with confidence — and you sidestep the guesswork when a brand's chart only lists a system you don't recognise. It takes a minute at home: our guide to measuring your foot shows exactly how.
The sizing systems we cover
The converter handles US, UK, European (EU), Australian (AU), Japanese (JP), Korean (KR), Chinese (CN) and Mexican (MX) sizes, plus width letters and foot length in centimetres, millimetres and inches. A few are worth flagging: Australian women's sizes follow the US scale while men's follow the UK scale; Chinese sizes are usually close to the European number or given in millimetres; and Mexican sizes are based on foot length in centimetres. For a deeper explanation of any single system, the EU, Japanese and Korean guides go system by system.
Shoe size conversion: frequently asked questions
How do I convert my shoe size to another country’s system?
Pick the gender tab, choose the system you already know (for example US or UK), type your size, and the converter shows the equivalent in every other system at once — US, UK, EU, AU, JP, KR, CN and MX — alongside your foot length in centimetres. You can also start from a foot measurement if you do not know any of your sizes.
Is there a universal shoe size?
No. There is no single worldwide standard, which is exactly why conversion is needed. The closest thing to a universal reference is foot length itself: Japanese sizes are simply foot length in centimetres and Korean sizes are foot length in millimetres, so measuring your foot in centimetres is the most reliable anchor when you shop across systems.
Are men’s and women’s shoe sizes the same?
In the US and UK they are not — those systems run separate men’s and women’s scales, and a women’s US size is roughly 1.5 sizes higher than the men’s number for the same foot. European, Japanese and Korean sizes are unisex and measure the foot directly, so the same EU number means the same length regardless of gender. Always check which gender tab is selected before reading a US or UK result.
Why is Australian sizing different for men and women?
Australia did not adopt one scale. Australian women’s shoe sizes follow the US system, while Australian men’s shoe sizes follow the UK system. It is the single most common conversion mistake, so the tool keeps the two separate — choose the right gender tab and the Australian column lines up correctly.
How accurate are shoe size conversions?
Conversions get you to the right size or within half a size, but they are approximate by nature. Two shoes labelled the same size can fit differently because of the last (the mould the shoe is built on), the material, and the style. Use the conversion as your starting point, then check the product’s own size chart and any brand fit notes (does it run small, large, wide or narrow?) before buying.
How do I measure my foot at home?
Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe, and measure the distance in centimetres — do it late in the day when your feet are at their largest, and measure both feet, using the larger one. That number maps directly onto the foot-length column in the converter, and our measuring guide walks through it step by step.
Brand Fit Guide - Does It Run True to Size?
Quick-reference fit notes for popular brands. Tap a card for the full size guide or shop the brand on Amazon.
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Adidas
MenTrue to sizeWomenTrue to sizeKidsTrue to sizeRecommended: True to sizeUltraboost runs slightly long
New Balance
MenRuns wideWomenRuns wideKidsRuns wideRecommended: True to sizeBest for wide feet
Converse
MenRuns largeWomenRuns largeKidsRuns largeRecommended: Size down ½Size down
Vans
MenTrue to sizeWomenTrue to sizeKidsTrue to sizeRecommended: True to sizeNarrow fit
Puma
MenTrue to sizeWomenRuns smallKidsTrue to sizeRecommended: Size up ½Women size up half
Reebok
MenTrue to sizeWomenTrue to sizeKidsTrue to sizeRecommended: True to sizeClassic true-to-size fit
ASICS
MenRuns narrowWomenRuns narrowKidsRuns narrowRecommended: Size up ½Consider wide sizing
On Running
MenTrue to sizeWomenTrue to sizeKidsTrue to sizeRecommended: True to sizePerformance running fit
Salomon
MenRuns smallWomenRuns smallRecommended: Size up ½Trail-specific fit
More guides & country converters
Country-specific converters preload the right sizing system. Guides explain the quirks behind each system and how to measure your foot accurately.
Country converters
- EU to US shoe size converterConvert European sizes to US in one click.
- UK to US shoe size converterBritish sizes mapped to US for men, women, and kids.
- Japanese shoe size converterJP sizes equal foot length in centimetres.
- Korean shoe size converterKR sizes equal foot length in millimetres.
- Australian shoe size converterWomen's AU follows US, men's AU follows UK - the AU sizing quirk.
Guides
- How to measure your foot for shoesStep-by-step home measurement with a diagram.
- EU shoe sizes explainedParis-point system, ranges, and why EU 42 might be US 9 or 10.5.
- UK vs US shoe sizesThe half-size offset and men/women conversions.
- Japanese shoe sizes explainedJP sizes equal foot length in centimetres - straightforward once you know.
- Korean shoe sizes explainedKR sizing is foot length in millimetres - common on athletic brands.
- Australian shoe sizes explainedAU women's follows US; AU men's follows UK - the gotcha that catches everyone.
- Kids' shoe size guideToddler, Little Kids, and Big Kids - the three US tiers and where they reset.
- Shoe width guide (2A to 4E)Width letters across US, EU, and UK plus when to choose wide-fit.
Brand guides
- Nike shoe size guideFit notes, women's vs men's, full size chart.
- Adidas shoe size guideConsistent sizing across performance and lifestyle lines.
- Converse shoe size guideRuns large — most people size down half to one.
- New Balance shoe size guideWide-fit specialists with E and 2E options.
- Vans shoe size guideTrue to size for most styles; slim lasts run narrow.
- Puma shoe size guideGenerally true to size across athletic and lifestyle.
- Reebok shoe size guideConsistent with standard US sizing; wide widths available.
- ASICS shoe size guideRunning-focused; narrow lasts, size up half if in doubt.
- On Running shoe size guideSwiss brand running true to size on most models.
- Salomon shoe size guideTrail and outdoor specialist — narrow fit, size up half.