About SizeAnswer
SizeAnswer is an independent reference site for sizes and units — built because most conversion sites are stuck in 1997, bury the answer under ads and essays, and barely work on a phone.
Accuracy
Where the numbers come from
Unit factors (inches, pounds, gallons, temperatures and so on) are exact international definitions — for example, one inch has been exactly 25.4 mm by treaty since 1959. Ring, paper and tire figures follow the published standards (ISO 8653 conventions, ISO 216, standard tire geometry). Shoe and clothing charts follow the most widely used international tables, with an honest warning on every page: brands deviate, so always check the maker’s own chart for the final call.
Found an error?
Tell us and we’ll fix it fast: hello@sizeanswer.com. Corrections are applied site-wide, not buried in a changelog.
Privacy
The short version: we don’t want your data
No accounts, no tracking cookies, no analytics profiles, no pop-ups. Conversions happen in your browser; nothing you type is sent to us or anyone else. The site is hosted on standard web infrastructure, which keeps ordinary server logs (IP address, requested page) for security — that’s it.
Frequently asked questions
Who is behind SizeAnswer?
SizeAnswer is maintained by an editorial team focused on measurement and conversion accuracy, working from official ISO and NIST reference standards. See our methodology page for details.
Is SizeAnswer free to use?
Yes. Every converter and chart is free, with no account, no pop-ups, and no tracking cookies.
How accurate are SizeAnswer's conversions?
Unit conversions use exact defined factors (like 1 inch = 2.54 cm exactly). Sizing charts (shoes, clothing, bras) vary by brand, so we publish honest ranges rather than false precision — see our methodology.
How is SizeAnswer different from other conversion sites?
We lead with the direct answer, add the real-world context a calculator can't (like fan oven equivalents or honest shoe-size ranges), and never use pop-ups or tracking.