A Guide to Poster & Paper Sizes
If you’re creating artwork or looking to add a poster to a display board, it’s important to get the size right and to know how the printed posters or paper will fit. The standard poster sizes are useful to know and to bear in mind when looking for your next display.
The most commonly used and recognised size is A0, A1 & A4 but there are paper size options available from A0 to A10. Unlike the name suggests, an A0 poster size is larger than the A4, the larger the number becomes the smaller the poster size. It's interesting to know how the A series paper & poster sizes can mostly be halved to create another A size. For example, if you take an A4 piece of paper and folded this in half, each half would be the size of an A5 poster.
View the below table for the standard UK A Series poster/paper sizes, available in Millimetres (MM) and Inches (IN)
| Poster Size | Millimeters (MM) | Inches (IN) |
| A0 | 841 x 1189 | 33.11 x 46.81 |
| A1 | 594 x 841 | 23.39 x 33.11 |
| A2 | 420 x 594 | 16.54 x 23.39 |
| A3 | 297 x 420 | 11.69 x 16.54 |
| A4 | 210 x 297 | 8.27 x 11.69 |
| A5 | 148 x 210 | 5.83 x 8.27 |
| A6 | 148 x 105 | 5.8 x 4.1 |
| A7 | 105 x 74 | 4.1 x. 2.9 |
| A8 | 74 x 52 | 2.9 x 2.0 |
| A9 | 52 x 37 | 2.0 x 1.5 |
| A10 | 37 x 26 | 1.5 x 1.0 |
In addition to the A series, there are also B and C paper sizes however, the B and C sizes aren't regularly used for poster and paper printing, but are popular for book printing and envelopes.
A Series Posters
A0 Poster - With a size of just under 1200mm, the A0 is a great size to grab attention and covers a great amount of space. The larger size allows for more design and artwork opportunities.
A1 Poster - A1 printed posters and paper are a popular size as these are commonly compatiable with display boards. The A1 is a fantastic size to cover the complete display board and can easily be interchanged.
A2 Poster - The A2 poster size is effectively half the size of the A1 measurement, even with the smaller size, the A2 print is a fan favourite for event posters.
A3 Poster - To imagine the size of an A3 printed poster/paper, all you need to do is combine 2 A4 posters. The A3 poster are often seen in shops and other retail space, and without taking too much room the A3 size gets the message out there.
A4 Poster - A4 paper and posters are frequently choosen due to the familiar size. But despite the smaller size, it's a versatile choice which has enough space for advertising and marketing.
All the A sizes are consistent across the world and will remain the same size, the same isn't applied to the B series paper and poster sizes as they varyslightly in Japan. Whilst the B paper and poster sizes aren't the most common they are an option when the A series isn't big enough. You'll also find the B series offer inbetween sizes, which the A series don't provide.
View the below table for the standard B Series poster/paper sizes, available in Millimetres (MM) and Inches (IN)
| Paper Size | Millimetres (MM) | Inches (IN) |
| B0 | 1000 x 1414 mm | 39.4 x 55.7 in |
| B1 | 707 x 1000 mm | 27.8 x 39.4 in |
| B2 | 500 x 707 mm | 19.7 x 27.8 in |
| B3 | 353 x 500 mm | 13.9 x 19.7 in |
| B4 | 250 x 353 mm | 9.8 x 13.9 in |
| B5 | 176 x 250 mm | 6.9 x 9.8 in |
| B6 | 125 x 176 mm | 4.9 x 6.9 in |
| B7 | 88 x 125 mm | 3.5 x 4.9 in |
| B8 | 62 x 88 mm | 2.4 x 3.5 in |
| B9 | 44 x 62 mm | 1.7 x 2.4 in |
| B10 | 31 x 44 mm | 1.2 x 1.7 in |
Similar to the A series paper/poster sizes, the B series uses the ratio of 1:root2. This simply means if you take a B0 Poster and fold in half, you'll have a B1 sized document, a B1 poster folded in half would be the same size as B2 piece of paper and so on.
Find out how certain poster sizes can fit on to our range of folding and modular display boards.