Methodology
Sizetab maps shoe sizes by comparing chart rows, using CM as the strongest cross-brand anchor when available, then showing EU, US and UK labels in context.
How sizes are mapped
Each shoe size row can include EU, US, UK, CM and IN values. When a user compares two brands, Sizetab looks for the closest available baseline value, usually CM, and then displays the corresponding label in the target brand.
When CM is missing, Sizetab can use another comparable label, but the result should be treated with lower confidence.
How systems are treated
CM is closest to foot length and is the preferred bridge. EU is useful, but not universal. US must be read with gender context. UK can be helpful but still depends on the brand chart.
Official vs approximate
Official data means the brand published a usable chart row. Approximate data means Sizetab derived a practical mapping from incomplete chart values. Mixed data means both chart rows and editorial caveats are needed.
Known limitations
Charts do not capture width, last shape, padding, materials, socks or personal preference. Model-specific notes can override a clean chart match, especially in running, skate and basketball shoes.