About 247Sizing
Accurate size conversions derived from real measurements — not copied from other charts.
What we do
247Sizing provides size conversion tools and reference charts for footwear, clothing, jewellery, pet accessories, bedding, sports equipment and more. Every conversion is derived from published geometric standards — Mondopoint (ISO 9407), the Paris-point scale behind EU sizes, the barleycorn scale behind UK and US sizes, and ISO 8653 for ring sizes — not copied from other websites.
Who maintains this site
247Sizing is maintained by a team of researchers and developers with backgrounds in measurement standards, retail sizing, and data engineering. All size charts are reviewed for accuracy before publishing, and brand-specific fit notes are updated as manufacturer data changes.
Our accuracy standard
Most sizing sites copy a conversion table from somewhere else. That's how wrong numbers spread across the whole web — one site's rounding error becomes everyone's. We derive every size from foot length, finger circumference, or body measurement using the published geometric systems, and we're honest about where brands cut small or large rather than presenting a single number as the final word. See our full accuracy methodology.
Editorial independence
Our size data and conversion tools are produced independently. Affiliate links to Amazon appear on some pages to help maintain the site — they never influence which sizes we report or how we explain them. See our affiliate disclosure.
Part of the 247 Tools Network
247Sizing is part of a wider network of free reference tools covering nutrition, salaries, vehicle specs, climate guides, and more. If you need to convert units or plan what to pack for a trip, our sister sites cover those too.
Contact
Questions about our data, corrections to a chart, or anything else — use our contact form. We read every message.