Foot Width Calculator
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.
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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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.