Foot Width Calculator

Quick answer:

Free foot width calculator: enter foot length and width or circumference to find if you need narrow, standard, or wide shoes. Get US width (D, 2E, etc.) and fit tips.

Enter your foot length and the circumference around the widest part of your foot (ball). We'll tell you if you're likely narrow, standard, or wide and suggest US width (e.g. D, 2E). Brands vary—use this as a starting point.

Foot length (cm) cm

Circumference at ball (cm) cm

How to measure width

Measure around the widest part of your foot (usually across the ball, behind the toes) with a flexible tape. Stand with weight even. If you don't have a tape, wrap a string and measure it against a ruler. See our Foot Width Guide for more.

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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 Foot Width Calculator

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.