+A2 refers to a standard paper size within the [ISO 216](/wiki/ISO_216) international series. It is a large format, exactly half the area of [A1](/wiki/A1) and double the area of A3, often favored for technical drawings, architectural plans, and posters.
+## See also
+- [A0](/wiki/A0)
+- [A3](/wiki/A3)
+- [Paper Size](/wiki/Paper_Size)
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