Mavena Size Converter

Shop any brand, anywhere. Know your size in one click.

If you've ever stared at a product page wondering "wait, is UK 12 a US 8 or a US 10?" - this extension fixes that forever.

Mavena Size Converter:

- Converts women's sizes across US, UK, EU, and Australian systems
- Works for tops, bottoms, dresses, shoes, and bras
- Convert by size OR by body measurements (bust/waist/hip)
- Auto-detect mode on Zara, H&M, ASOS, Shein, Revolve - see your size right on the product page
- Save your measurements once, convert forever

Built by Mavena & Co, a women's fashion brand that believes sizing should be honest.

Privacy: Zero tracking. Your preferences live only in your browser's local storage. Nothing is sent to a server, ever.

Mavena Size Converter is compatible with third-party retailer websites including Zara, H&M, ASOS, Shein, and Revolve. Mavena & Co. is not affiliated with, endorsed by, or sponsored by any of these retailers. All trademarks are the property of their respective owners.

Size conversions provided by this Extension are approximate and based on published industry sizing standards (including ASTM D5585 and EN 13402 references). Sizing varies significantly between brands, garment styles, and manufacturing runs. Always verify your size against the specific brand's published size chart and measurement guide before purchasing. Mavena & Co. is not responsible for fit, returns, or purchase outcomes on products ordered from third-party retailers based on conversions from this Extension.

Learn more: mavenaco.com