Comparison
Nike vs Adidas Fit
There is no reliable fixed size adjustment between entire brands. Compare exact models, regional charts and intended fit.
Start with your current body or foot measurements and the relevant product chart. Do not automatically size down in adidas or size up in Zara based only on the brand name.
Nike describes Dunk as generally true to size; adidas describes Samba as generally true to size, with a possible increase for wider feet. Other silhouettes need their own advice.
Fit and cushioning depend on model and version. Brand-wide toe-box rankings or fixed stack-height differences are not established by a generic label comparison.
| Check | What to compare |
|---|---|
| Length or body range | The current product chart |
| Width or silhouette | Available width and fit options |
| Version and market | The actual regional listing |
| Returns | Current trial and return conditions |
Key takeaways
- No automatic brand-wide half-size adjustment.
- Use the exact model’s measurements.
- Check width, material and preferred fit.
Calculator
Convert shoe sizes across systems
Related reading
Nike Size Guide
Nike fit depends on the silhouette, category and width. Use current official model guidance rather than a blanket lifestyle size-down rule.
US vs EU Shoe Sizes Explained
US and EU shoe labels use different increments. Conversion is approximate and manufacturer-specific, not a universal equation.