a paper smaller than the average sized printer paper (A4)
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The size of A3 paper is 420mm x 297mm
A3.
Two - A sheet of A4 paper is exactly half the size of a sheet of A3.
The A-series sizes of office paper are configured like this:A0 has an area of 1 m2A1 is half the size of A0, A2 is 1/2 of A1, A3 is 1/2 of A2, & A4 is 1/2 of A3.So, 24 (or 16) sheets of A4 paper = 1 m2
A piece of paper has three dimensions. They are the length, width and thickness of the paper. Paper is available in many sizes such as A1, A3, A4 and A5.