Nike Shoe Size Guide & Conversion
Shopping Nike from another country? This page converts Nike shoe sizes to your region and explains how Nike's sizing tends to run. Tends to run slightly small; many buyers size up half for a comfortable fit, especially in running.
Converted Sizes
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.
Fit and sizing explained
Fit Problems Explained
Most fit issues come down to measurement, not the size itself. Measuring your foot length in centimeters and comparing it against the chart removes most of the guesswork.
How to Measure Your Feet in CM · Common Shoe Sizing Mistakes
Why Sizes Vary
Shoe sizing systems were built independently by region, so a size label alone can’t be compared directly across countries. Anchoring to a physical measurement is the reliable way to translate between them.
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
Regional shoe sizing systems evolved independently, so the same foot length gets a different number in the US, UK, EU, and Japan. Comparing foot length in centimeters is the most reliable way to check a size across regions.
Why EU and US Shoe Sizes Differ · How Japanese Shoe Sizes Work · How UK Shoe Sizes Differ From US and EU
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.
Explore more size guides
Shoe Size Converter
Convert any shoe size across US, UK, EU, Japan, China, and CM.
Clothing Size Converter
Convert tops, pants, and dress sizes across regions.
Measurement Assistant
Step-by-step help measuring your foot or body accurately.
How to Measure Your Feet in CM
The most reliable way to cross-check any size chart.
Adidas size guide
See sizing and conversion details for Adidas.
Puma size guide
See sizing and conversion details for Puma.
New Balance Shoe Size Guide
See sizing and conversion details for New Balance Shoe.
Frequently Asked Questions
How do I use this converter?
Select your gender, region, and size above. The converted sizes for other regions appear automatically — no separate submit step needed.
Does Nike run true to size?
Tends to run slightly small; many buyers size up half for a comfortable fit, especially in running.
How does Nike sizing compare to standard charts?
Nike uses US sizing as the base for most markets; international sizes are converted from US. Athletic shoes often run narrow and slightly small.
Does Nike sizing vary by product line?
Running vs. basketball vs. lifestyle models can vary. Women's and men's scales differ; kids use age-based sizing in some regions.
Should I check Nike's official size chart too?
Yes. This converter gives a standardized international equivalent, but individual shoe items can run differently by style or season — checking Nike's own size chart for the specific product reduces the chance of a return.