A3 size paper is one of the most popular formats in the ‘A’ series of paper, ranging from A0 (the largest) to A10
(the smallest).
A3 is twice larger than A4 paper and its dimensions make it perfect for everyday use in both personal and professional projects.
A3 is versatile and an ideal size for small posters, signs, folded leaflets and menus. It’s also a practical, useful size to use as a visual aid during an office meeting.
Size of the different paper formats of the A series in mm and inches
A3 paper size measurements are 297 mm x 420 mm, 29.7 cm x 42 cm or 11.7 in x 16.5 in. Its printing surface is large enough for everyday use at 0.125 m² or 1250 cm².
This table shows that the standardisation of these formats maintains their proportions when a sheet of paper is cut or folded in two. The relationships between the sizes are as follows:
Whether used in a professional capacity or for personal use, printing photos or other designs in A3 is very popular. During the creation of the source file, the resolution is defined and changes the A3 format to pixels:
A sheet of A3 size paper
If you have an A3 or A4 printer available to use, you must then prepare your file and add a 3 mm bleed margin to your document to avoid losing some of the visual in printing. You should also adapt the size and resolution of the image.
Although copiers and domestic printers are improving every year, asking the advice of a printing professional for scanning on A3 sized paper can also be helpful. They can advise you on the best type of paper to use for the most professional and high-quality outcome.
2022 calendar examples in A3 to print.
A3 sized paper is just as popular among professionals as it is among individuals. It has a wide range of possible uses.
The versatility of A3 makes it a common format in creative industries including photography. Page layout software InDesign offers a huge variety of options for visual creations and the design of printed posters.
North America is among only a few remaining countries that don’t use the A series as its standard for paper sizes. Other countries include:
In North America, the closest type to A3 size paper is called Tabloid or Ledger. It measures 279 x 432 mm.
Due to its rather large size, A3 paper is often used in industries that require diagrams, including engineering and science. It’s also popular in the office environment and schools, for presentations and posters.
As A3 can be halved to create two A4 pages, it’s also useful for leaflets and restaurant menus.
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