Paper Sizes – Complete A to Z Reference
Complete reference for every international paper size standard.
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A4Size.uk is your complete UK-focused reference for international paper sizes. From A4 (210 × 297 mm) — the everyday standard in Britain — to US Letter, B5, C4 envelopes, and photo prints, every size is listed with full conversions across 30+ units: millimeters, centimeters, meters, inches, feet, points, picas, pixels at multiple DPIs, and more.
Whether you are printing a document, designing a poster, or choosing the right envelope, our free tools and detailed tables give you accurate dimensions in your preferred language.