Frequently asked questions.
What’s bigger - A3 or A5?
The A3 paper size is bigger than A5. A3 is 297 mm x 420 mm whereas A5 is 148 mm x 210 mm. The smaller the number in the A paper size format, the larger it is. That’s why A0 is the largest paper size in the format. A5 is a quarter the size of A3.
Why does the US use different names for its paper sizes?
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:
The Dominican Republic.
In North America, the closest type to A3 size paper is called Tabloid or Ledger. It measures 279 x 432 mm.
What is the A3 paper size used for?
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.