Size Calculators
Find the size you actually need before you buy: convert clothing, bra, shoe, and ring sizes across US, UK, EU, France, Italy, Japan, and Australia, or work them out from your measurements. Everything runs in your browser and your measurements are never stored.
Most tools run right on your device. When one needs the internet, we only send what's required.
The tools
Browser-basedClothing & Accessories Sizing
3 toolsFind your women's, men's, kids', jeans, bra and shoe size from body measurements and convert it across US, UK, EU, France, Italy, Japan, Australia, Korea and Russia. Fit breakdown, body-shape tips and printable charts, free, in your browser.
Find your ring size at home from finger circumference or diameter, size a ring you own on screen (calibrated with any bank card), or print a true-scale ring sizer. Converts US, UK, EU, German, Japanese and Swiss sizes, free, in your browser.
Find your belt size from your pants size or waist for men, women and kids, measure a belt you already own, convert US inches, EU cm and S–3XL, and plan the strap length and hole positions for a custom belt. Free, in your browser.
Why Size Calculators?
ToolNova's Size Calculators tools are built to be fast and private. Most run entirely in your browser; when a tool needs the internet, like live data or an SEO check, it sends only what's required and never stores your data.
Frequently Asked Questions
6 questionsA size number is a regional label, not a measurement. A US women's 8 is roughly a UK 12, an EU 40, and a JP 11. Our converter maps your measurement onto each region's scale so the number means the same body everywhere.
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