Everything you need to know about using MySizeIs for international size conversions.
Yes, completely and permanently free. No premium tier, no signup, no paywall. Every converter and chart is available instantly.
No. MySizeIs has no accounts, no login, and no registration. All tools work immediately without providing any personal information.
Nowhere. All calculations happen in your browser. We do not send your measurements to any server, do not store your sizes, and do not share any data with third parties. The only data collection is anonymous page view analytics via Google Analytics.
Not currently. All converters are self-contained HTML pages and are not designed as embeddable widgets. If you would like to link to a specific converter, direct links work for any page.
No. MySizeIs is a size conversion tool, not a retailer. We help you find the right size so you can shop with confidence from any retailer worldwide.
Send an email to the address in the footer. We read every suggestion and prioritize improvements based on user feedback.
Our conversion tables are based on international sizing standards (ISO, Paris point, barleycorn system) and are cross-referenced with official brand size charts. We clearly note when conversions are approximate, because honesty about limitations is better than false precision.
Standard conversions are accurate for most brands, but individual brands may vary. This is why we include brand-fit notes on every converter. For critical purchases, always check the specific brand size chart alongside our conversion.
Yes. MySizeIs is designed mobile-first. All converters, charts, and tools are fully functional on any screen size, from a small phone to a large desktop monitor.
Yes. We have dedicated converters for kids shoe sizes (ages 4-12) and baby shoe sizes (0-24 months), plus children clothing sizes.
US, UK, EU, Japan, Australia, China, French, Italian, and Mondopoint. Coverage varies by category, with shoes having the widest range of supported systems.
We review and update our conversion tables quarterly. International sizing standards change very rarely, but brand-specific fit notes are updated when we receive new information.