Shoe Size Guide: How to Find Your True Fit
Shoe sizing is surprisingly inconsistent — numbers differ between brands and between the US, UK and EU systems. The reliable way to get a great fit is to measure your feet and convert from foot length, not to assume your 'usual size'.
Advertisement
Why sizes vary
Different countries use different scales, and brands cut their lasts differently, so a US 9 in one brand may feel like a US 9.5 in another. Your feet also change over time. The one constant is your foot length in centimetres — anchor your sizing to that.
How to measure your feet
- Stand on a sheet of paper in the evening, when feet are largest.
- Trace around each foot or mark the heel and longest toe.
- Measure the length in centimetres; do both feet.
- Measure the widest part for width.
- Use the larger foot to choose your size.
Reading size charts
Once you know your foot length, use a conversion chart or our shoe size converter tool to translate it into US, UK and EU sizes. As a rough European guide, EU size is approximately (foot length in cm + 1.5) × 1.5.
Advertisement
Fit tips
- Leave about a thumb's width at the toe
- Fit to the larger foot
- Account for sock thickness
- Re-measure if it's been a few years
- Prioritise comfort over the number on the box
Medical disclaimer: This article is for general education only and is not medical advice. It does not replace diagnosis or treatment from a licensed podiatrist or physician. If you have diabetes, an infection, severe pain, numbness, or a wound that will not heal, seek professional care promptly.
Frequently asked questions
- Are US and UK shoe sizes the same?
- No. US sizes typically run about 1 size larger than UK sizes for adults; always convert from foot length.
- Should I size up in shoes?
- Fit to your larger foot with about a thumb's width of room — neither cramped nor sliding.
Sources & further reading
- Footwear fit, American Podiatric Medical Association (APMA)
- Shoe fitting, NHS
- Healthy footwear, Mayo Clinic