A1 Poster Size

The A1 poster size is 3.11 x 23.39 inches. In millimeters this is 594 x 841 mm. A1 pixel dimensions are 1648 pixels x 2384 pixels for 72 dpi and 7016 pixels x 9933 pixels at 300 dpi.

Comparison with Other ISO Paper Dimensions

4A0 measures 1682 x 2378 mm; 2A0 is 1189 x 1682 and A0 is 841 x 1189. The A2 size is 420 x 594 while A3 is 297 x 420. A4 measures 210 x 297 and A5 148 x 210. A6 is 105 x 148 mm and A7 measures 74 x 105.

A1 Poster Size Design Principles

These poster dimensions are designed to provide information and visuals. The information must grab the attention of the reader. These are not like written documents that readers will go over in detail. Properly designed, the message will get across instantly.

The poster, regardless of the size, must have a story. There has to be a coherent structure (introduction to conclusion). One of the common pitfalls of poster design is cramming in too much data. Just get to the point since people are not likely to read them in detail.

Other Elements

Put graphs, images, diagrams and tables if needed. Boxes can be used to stress points. Of course you need to have the right tools. There are several computer graphics programs that can do the job. You can use illustrator and photo editing programs together. The A1 dimensions are widely recognized by printers, so the process will be straightforward.

Keeping the Target in Mind

The message and look of the poster must match its intended target. The poster may look good for you, but does it resonate with your intended audience? Whether you are aiming at schoolchildren or CEOs, you need to make sure the look is appropriate.


The key is balancing information presentation with artistic design. It’s vital that people like the poster’s appearance (that is what will grab their attention in the first place). But they must also get the information you are sending out. This takes time, which is why companies usually come up with several designs. Companies check for feedback before releasing the poster.

If you are going to make an A1 poster size, make sure that the information and design is sufficient for this type. Do not attempt to squeeze in more info than necessary. Aside from the text, you should also consider the colors, placement and other factors.

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