What are shoe sizing guides?

Shoe sizing guides are articles that explain how sizing systems work (US, UK, EU, Japan, CM), how to measure your feet, why sizes differ by region, and how to avoid common conversion mistakes.

How do I measure my feet for shoe size?

Measure your foot length in centimeters: place your foot on paper against a wall, mark the longest toe, and measure from wall to mark. Use our measurement guide and converter for your equivalent size.

Why do EU and US shoe sizes differ?

EU and US use different scales and numbering. EU sizes are typically about 1–1.5 larger than US for the same length. Our regional differences guides explain each system.

Where can I find all sizing articles?

This page links to every guide: measurement, regional differences, fit and comfort, sizing standards, conversion science, and common mistakes. Use the sections above to jump to the topic you need.

Shoe Sizing Guides

Quick answer:

Guides to shoe sizing: how to measure your feet, why EU and US sizes differ, fit tips, sizing standards, and common mistakes. Links to all sizing articles.

Use these guides to understand how shoe sizes work, how to measure your feet, why sizes differ by region, and how to avoid common mistakes. Each section links to in-depth articles.

Measurement Guides

How to Measure Your Feet in CM

Regional Differences

Fit & Comfort

Common Shoe Sizing Mistakes

Sizing Standards

How Shoe Sizing Works

Conversion Science

Common Mistakes

Common Shoe Sizing Mistakes

Common questions

How should I use this converter?

Pick your region and size, then read the equivalents. When in doubt, measure in centimeters and compare to the brand chart.

Why do sizes differ between countries?

Each region uses its own scale; mapping through foot length (cm) reduces error.

More on Shoe Sizing Guides

See linked guides on this site for measurement tips and regional differences.

Data sources

ISO and regional footwear sizing references (length-based mapping)
Published brand size charts (e.g. Nike, Adidas) for cross-checks—not endorsements
International measurement and apparel sizing studies (public summaries)

Why Sizes May Vary

Shoe and clothing sizes can vary between brands due to manufacturing differences, materials, and regional sizing standards.

Frequently Asked Questions

What is EU 42 in US shoe size?

EU 42 typically converts to US men's size 9 and US women's size 10.5, depending on brand and width. Use any converter on this page when available.

Are EU and US shoe sizes the same?

No. The EU sizing system and US shoe sizing scale use different scales. International shoe size conversion is most reliable when you anchor to foot length in cm.