What is the A Series?
The A Series is the most common paper size standard worldwide, defined by ISO 216. Based on the aspect ratio of โ2:1, each size is exactly half the area of the previous size. A4 (210 ร 297 mm) is the most widely used size for office documents.
โ2:1 Aspect Ratio
The A Series is based on the aspect ratio of โ2:1. This means each size is exactly half the area of the previous size, making scaling simple and efficient.
A4: The Global Standard
A4 (210 ร 297 mm) is the most common paper size worldwide, used in offices, schools, and homes for letters, forms, and reports.
Global Adoption
The A Series is used in almost every country except the United States and Canada, where Letter and Legal sizes are standard.
A Series Paper Sizes
Complete reference for all A Series paper sizes from A0 to A10 with dimensions and pixels at 300 DPI.
๐ Complete A Series Size Table
Detailed comparison of all A Series paper sizes with dimensions in mm, inches, and pixels at 300 DPI.
| Size | mm | inches | Pixels (300 DPI) | Common Use |
|---|---|---|---|---|
| A0 | 841 ร 1189 | 33.1 ร 46.8 | 9933 ร 14043 | Billboards, banners, posters |
| A1 | 594 ร 841 | 23.4 ร 33.1 | 7016 ร 9933 | Large posters, architectural plans |
| A2 | 420 ร 594 | 16.5 ร 23.4 | 4961 ร 7016 | Medium posters, plans |
| A3 | 297 ร 420 | 11.7 ร 16.5 | 3508 ร 4961 | Small posters, drawings |
| A4 | 210 ร 297 | 8.3 ร 11.7 | 2480 ร 3508 | Standard office documents |
| A5 | 148 ร 210 | 5.8 ร 8.3 | 1748 ร 2480 | Flyers, brochures, notebooks |
| A6 | 105 ร 148 | 4.1 ร 5.8 | 1240 ร 1748 | Notecards, postcards |
| A7 | 74 ร 105 | 2.9 ร 4.1 | 874 ร 1240 | Small notepads, tags |
| A8 | 52 ร 74 | 2.0 ร 2.9 | 614 ร 874 | Very small notes, labels |
| A9 | 37 ร 52 | 1.5 ร 2.0 | 437 ร 614 | Mini notes, tickets |
| A10 | 26 ร 37 | 1.0 ร 1.5 | 307 ร 437 | Small labels, stamps |
๐ A Series Paper Uses
Office Documents
A4 is the standard size for office documents, letters, forms, and reports worldwide. It's the most commonly used paper size in business environments.
Design & Printing
A3 and A2 are popular for design work, posters, and professional printing. Architects and designers use A1 and A0 for large-scale plans and presentations.
Books & Publishing
A5 and A6 are used for books, notebooks, and pocket-sized publications. The A Series provides a complete range from pocket books to large format displays.
Mail & Correspondence
A4 is the standard for business correspondence and mail. A5 and A6 are used for invitations, greeting cards, and personal correspondence.
Professional Printing
The A Series is the standard for professional printing, ensuring compatibility with printers, copiers, and print shops worldwide.
International Standards
The A Series is recognized globally, making it ideal for international documents, publications, and professional communication.
๐ก Professional Tips for A Series Paper
๐ฏ Choose the Right Size
Always select the appropriate paper size for your document. A4 for standard office documents, A3 for posters and drawings, A5 for brochures and notebooks.
๐ Aspect Ratio
The โ2:1 aspect ratio of the A Series means you can scale documents up or down without cropping. This is essential for professional design and printing.
๐จ๏ธ Printing Compatibility
Ensure your printer supports the A Series sizes you need. Most office printers support A4, A3, and A5. Check your printer's specifications for larger sizes.
โป๏ธ Sustainability
Choose recycled or FSC-certified A Series paper where possible. The A Series is available in a wide range of sustainable options.
๐ Paper Weight
Standard office paper is 80 gsm. For professional printing, consider 100-120 gsm for higher quality and durability.