Printing Lingo: What is -�A-Series-� Paper, such as A3, A4, A5, etc.?

In the United States, and other parts of North America, standard paper sizes are based on inch measurements. For example, the three most popular US paper sizes are 8.5" x 11" (Letter), 8.5" x 14" (Legal), and 11" x 17" (Tabloid/Ledger).

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However, the rest of the world uses an International standard for paper sizes which is based on the metric system.

A-Series refers to the most popular size category within the International paper system. Paper sizes within the A-Series range from A0 (largest) to A10 (smallest).

When examining the size chart, one will observe that the A-Series adheres to a highly rational sizing system. Commencing with the A0 sheet size, which encompasses an area of one square meter, each subsequent size in the series is precisely half the size of its predecessor. For instance, the A1 sheet size is half the size of A0, the A2 size is half the size of A1, the A3 size is half the size of A2, and so forth.

Also, all A-Series sheets have a consistent size ratio, with the longest side of a sheet being equal to the shortest side multiplied by the square root of two (approximately 1.41).

If you're curious, the most widely used sheet size globally is A4, which measures 8.27 inches by 11.69 inches or 210mm by 297mm.

If you need help with an upcoming print project, be sure to get in touch with Formax Printing. Just give us a call at 866-367-6221. Or, if you already know your specs submit our quote request form. As always, we look forward to assisting with your printing needs!

Take care! Rick

About the Author

Rick Stallings is the owner of Formax Printing Solutions in St. Louis, MO. Formax provides a complete array of offset and digital printing services. Specialty areas include book printing, full-color printing, laminated printing, map printing and mailing services. If you ever have a printing question or project you would like to discuss, Rick is always happy to help. He can be reached at 866-367-6221 or by submitting our easy quote request form. Rick and the Formax team have been providing worry-free printing and related services since 1985.

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