Shoe Size Guides

Understanding shoe sizes across regions is the first step to ordering the right fit. US, UK, EU, Japan, and China each use different numbering systems and reference lengths, so a "9" in one country is not the same as a "9" in another. Shopping across borders or buying from brands that label in a single region makes conversion essential—and getting it wrong means returns, discomfort, or wasted money. This hub brings together everything you need: an explanation of how international shoe sizing works, why sizes differ between regions and brands, how width systems fit in, and when to rely on a conversion chart versus measuring your feet. Below the guide you'll find converters for quick lookups, programmatic conversion pages for specific size pairs, in-depth articles on measurement and regional differences, interactive calculators, and printable charts. Use the content above to build your understanding; use the links below to convert, measure, and print.

How International Shoe Sizing Systems Work

Most systems are built on a standard foot length, usually in centimeters or a regional last. The US system uses different scales for men, women, and kids: men's sizes start around 1 and step in half sizes; women's run about 1.5–2 sizes higher for the same length. UK sizes are typically one size down from US men's (e.g. US 9 ≈ UK 8). EU (Paris point) sizes use a formula based on length in cm and produce numbers in the mid-30s to mid-40s for adults. Japan and China often use cm-based or EU-like numbering. Because there is no single global standard, conversion charts and tools map one system to another using agreed reference lengths; small variations exist between chart publishers and brands. Kids' sizes follow yet another scale and transition into adult sizing around the early teens.

Why Sizes Differ Between Regions

Historical standards, last shapes, and target markets all contribute. The UK and US diverged early; EU adopted the Paris point. Manufacturing hubs (e.g. Asia) may label in EU or local cm. Brands also "grade" sizes differently—some add more toe room, others build snugger. So even after converting, a US 9 in one brand can fit like a US 9.5 in another. Knowing your foot length in cm gives you a stable reference: you can compare any size table or chart to that number and see which regional size corresponds, then adjust for brand if needed.

Width Systems Explained

Length is only half the story. Width (narrow, standard, wide) is expressed differently by region. In the US, men's standard width is often "D" and women's "B," with "2E" or "EE" for wide and "B" or "C" for narrow in men's. UK and EU sometimes use single letters or terms like "narrow" and "wide" without a universal code. Not every style comes in multiple widths; athletic and work brands (e.g. New Balance, ASICS) often offer more width options. If you need wide or narrow, use our foot width calculator and then filter by width when shopping.

Common Sizing Mistakes

Assuming US and EU are the same number, guessing without measuring, or using the wrong gender/category (men's vs women's vs kids) leads to wrong sizes. Measuring in the morning when feet are smaller, or using a too-short ruler, also causes errors. Many people forget to measure both feet and use the larger; others ignore width and blame "bad sizing" when the length was right but the shoe was too narrow. Best practice: measure both feet in the evening, use the larger length, and convert with a chart or tool that asks for gender and region. For kids, use a kids-specific chart or calculator because the scale is different from adult sizes.

When to Use a Conversion Chart vs Measurement

Use a conversion chart or converter when you already know your size in one region (e.g. US 9) and need the equivalent in another (e.g. EU 42). Use measurement when you don't know your size, your feet have changed, or you're buying from a brand that only lists cm. Measuring gives you a number (e.g. 26 cm) that you can plug into any converter or chart; it's the most reliable baseline. Below we link to both: converters and programmatic conversion pages for quick lookups, and measurement guides, calculators, and printables for when you start from foot length.

Converters

Use these tools when you know a size in one region and need the equivalent in another, or when you have a foot length in cm and want US, UK, EU, or Japan sizes in one step. The main shoe size converter accepts any input; the CM and regional converters are quick lookups for common pairs.

Region sizing systems

Detailed guides to each major shoe sizing system: how it works, conversion examples, width, and links to programmatic conversion pages and tools.

Programmatic pages

We publish single-size conversion pages (e.g. EU 42 to US, US 9 to UK, 26 cm to US) for crawlability and direct linking. The programmatic index lists all of them; the shoe-size and men's/women's/kids indices group by category. Use these when you need a dedicated URL for one conversion.

Articles & guides

In-depth guides cover how to measure your feet, how to measure in cm, foot width and shoe fit, why EU and US differ, how UK and Japanese sizing work, and common mistakes. Use these to understand the systems before converting or buying.

Tools

Interactive calculators take your foot length (and for the width calculator, circumference at the ball) and return US, UK, EU, and Japan sizes. The kids calculator adds age-range and next-size guidance. The Measurement Assistant combines foot and clothing conversion in one place.

Printables

Print or save as PDF: EU/US shoe size reference chart, kids shoe size guide, foot measuring sheet, and printable cm ruler. Use these for at-home measuring and to keep a size reference when shopping online.

Frequently Asked Questions

Is US shoe size the same as EU?

No. US and EU use different scales. For example, a US men's 9 is roughly equivalent to EU 42–42.5. The numbers don't match 1:1, so always use a conversion chart or converter and select the correct gender (men's, women's, or kids).

Should I measure my feet in cm or inches for shoe size?

Measuring in centimeters is recommended because most international size charts and our converters use cm. If you measure in inches, multiply by 2.54 to get cm, or use a tool that accepts both. Measure both feet in the evening and use the larger length.

Why do I get different shoe sizes for men vs women for the same foot length?

US and UK use separate scales for men and women. The same foot length (e.g. 26 cm) corresponds to a smaller number in men's (e.g. US 9) and a larger number in women's (e.g. US 10) because the scales start at different points. Always choose the category that matches the shoes you're buying.

What is the difference between shoe width letters (D, 2E, etc.)?

In the US, D is standard width for men and B for women. 2E or EE is wide; B or C can be narrow for men. Not all brands offer multiple widths. Use our foot width calculator with your length and ball circumference to see if you need narrow, standard, or wide, then filter by width when shopping.

Can I use the same shoe size for all brands?

Not always. Brands grade sizes differently—some run small or large. Your converted size is a starting point. Check our brand sizing guides and the brand's own size chart for the product. When in doubt, size up for comfort or order two sizes if returns are easy.

Master guide, region systems & brand comparisons

The master pillar covers all size systems in one place. Region pages explain EU, US, UK, and Japan shoe sizing in detail. Brand comparison pages compare Nike vs Adidas and Zara vs H&M fit and sizing.

Authority hub pages

These four hubs organize the same resources by theme: shoe sizing, clothing sizing, brand-specific guides, and measurement. Use the one that matches your task, or jump between them for converters, articles, tools, and printables.