What Are the Exact Dimensions of A1, A2, A3, A4, and A5 Paper Sizes?

Discover the precise measurements of A1 to A5 paper sizes and learn how each size relates as half of the previous. Easy scaling explained.

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A1 measures 594 x 841 mm, A2 is 420 x 594 mm, A3 is 297 x 420 mm, A4 is 210 x 297 mm, and A5 is 148 x 210 mm. Each size is half of the previous one, so A4, for example, is half of A3 size. This system is designed for easy scaling between different sizes.

FAQs & Answers

  1. What are the dimensions of A4 paper size? A4 paper measures 210 x 297 millimeters, which is half the size of an A3 sheet.
  2. How do A paper sizes relate to each other? Each A series paper size is exactly half the size of the previous larger size when folded along its larger dimension.
  3. What is the standard system used for A series paper sizes? The A series paper sizes follow the ISO 216 standard, which allows easy scaling between sizes.

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If you're interested in paper formatting and sizing, check out our related videos on other ISO paper sizes like B and C series, or guides on best printing practices for different paper dimensions.

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  3. What Are A4 and A5 Paper Sizes? Dimensions and Uses Explained Learn the dimensions and common uses of A4 and A5 paper sizes. Understand why A5 is half the size of A4 and ideal for notebooks and flyers.
  4. A4 vs A5: Which Paper Size is Bigger? Discover the differences between A4 and A5 paper sizes, including dimensions and common uses.
  5. A5 vs A4 Paper Size: How Do They Compare? Discover the size difference between A5 and A4 paper. Learn why A5 is ideal for compact prints and portability.
  6. What Is the Next Paper Size Up from A5? Understanding ISO 216 Standards Discover the next paper size up from A5—A4—according to the ISO 216 standard, including dimensions and common uses.