About Us
The story and mission behind a4size.app.
Welcome to a4size.app, your comprehensive online encyclopedia for global paper sizes, dimensions, and international standards. Our mission is to provide accurate, visual, and easily accessible dimensional resources for designers, print shops, students, offices, and developers worldwide.
Whether you are looking for standard international ISO 216 dimensions (like A4, A3, or B-series formats), American office standards (like Letter and Legal), photography print formats, business cards, or specialty regional standards from around the globe, we have cataloged them all.
Accurate, Free, and Fast
We are committed to keeping this database 100% free, fast, and accessible without registration or login requirements. All dimensional data is verified against official standard organization specifications (including ISO, ANSI, DIN, and JIS).