https://papersizes.io/

Get instant clarity on every global paper standard with PaperSizes.io, the complete reference library for print and digital design. Built for designers, printers, and architects, PaperSizes.io catalogs over 250 international, US, and regional formats—including ISO, ANSI, RA, and Imperial series—so you can quickly find exact dimensions in millimeters or inches. With smart comparison tools, a metric-imperial switcher, and clean visual layout, the site makes specification and scaling effortless across print and digital projects. Originally conceived as a designer side project, PaperSizes.io is now a trusted global resource for accurate paper data and size conversions.


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