Nike Shoe Size Guide & Conversion
Nike size chart and conversion: shoes sizing for US, fit tips, and how to convert Nike sizes to US, UK, and EU. Use the sections below to understand Nike sizing, fit tendencies, and how to convert to your region. For exact conversions, use our generic converters linked at the bottom.
Brand sizing philosophy
Nike uses US sizing as the base for most markets; international sizes are converted from US. Athletic shoes often run narrow and slightly small.
Known inconsistencies
Running vs. basketball vs. lifestyle models can vary. Women's and men's scales differ; kids use age-based sizing in some regions.
Fit tendencies
Tends to run slightly small; many buyers size up half for a comfortable fit, especially in running.
Conversion comparison
Approximate shoe size equivalents (use our converters for exact conversions):
| US | UK | EU |
|---|---|---|
| 7 | 6 | 40 |
| 8 | 7 | 41 |
| 9 | 8 | 42 |
| 10 | 9 | 43 |
| 11 | 10 | 44 |
Fit and sizing explained
Fit Problems Explained
Step-by-step guide to measuring foot length in centimeters for accurate shoe size conversion. Avoid common shoe sizing mistakes when converting between regions. Fit tips and conversion best practices.
How to Measure Your Feet in CM · Common Shoe Sizing Mistakes
Why Sizes Vary
Understand how shoe sizing systems work across US, UK, EU, Japan, and CM. Educational guide with conversion references. Avoid common shoe sizing mistakes when converting between regions. Fit tips and conversion best practices.
Brand Differences
Brands use different lasts and fit models. Nike often runs small; Adidas and Puma can differ by style. Always check the brand's size chart before ordering.
Regional Differences
Why European and US shoe sizes use different scales. Regional differences and conversion explained. How Japanese shoe sizing works and how to convert to US, EU, and UK. Japan size chart explained. How UK shoe sizes differ from US and EU. Conversion and regional comparison guide.
Why EU and US Shoe Sizes Differ · How Japanese Shoe Sizes Work · How UK Shoe Sizes Differ From US and EU
Generic converters
Convert any size between regions using our tools:
User fit warnings
Always check the brand's official size chart for the specific product. Sizing can change by season and style. When between sizes, consider sizing up for comfort or ordering two sizes and returning one. Read recent customer reviews for fit notes.