Brand Sizing Guide
This guide explains how brand sizing works, why sizes vary between brands, and how to use our converters and brand-specific pages to get a better fit when shopping internationally or across brands. Use the sections below: Converters, Regions, Size Pairs, Guides, and Tools.
Converters
Main and category converters to get your baseline size before checking brand fit.
Regions
Convert between regions, then check the brand guide for fit tips.
Size Pairs
Single-size conversion pages; combine with brand guides for best fit.
- EU 42 to US
- EU 40 to US
- US 9 to EU
- UK 9 to US
- EU 38 to US (women's)
- CM 26 to US
- Programmatic Index (all size pairs)
Guides
Semantic guides and fit hubs.
- Shoe Sizing Guides
- Brand Size Guides
- How Shoe Sizing Works
- Why EU and US Sizes Differ
- How to Measure Your Feet in CM
- Common Shoe Sizing Mistakes
- How UK Shoe Sizes Differ
- How Japanese Shoe Sizes Work
- Brands That Run Small
- Brands That Run Large
- Nike Shoe Size Chart
- Adidas EU to US
- Puma Shoe Size Chart
- Zara Clothing Size Guide
- H&M Size Converter
- Shein Size Converter
- Uniqlo Size Guide
- New Balance Shoe Size Chart
- ASOS Size Guide
- Levi's Jeans Size Guide
Tools
Measurement and printable tools.
Frequently Asked Questions
Why do brands fit differently?
Brands use different fit models, design goals, and regional standards. Some use vanity sizing; others run true to size or small. Always check the brand's size chart when possible.
How do I convert my size for a specific brand?
Use our shoe or clothing size converter for your region, then open our brand size guides for that brand to see fit tips and any recommended size adjustments.
Where can I find all brand size guides?
See our Brand Size Guides hub for Nike, Adidas, Zara, H&M, and more. Each guide covers fit philosophy and conversion to US, UK, and EU.