See the Wikipedia article ISO 216, the international standard on paper sizes.
- A standard paper size, defined by ISO 216.
- dimensions: 210 x 297 mm
- 2001, Eoin Colfer, Artemis Fowl, page 66:
- "There are preparations to be made for our guest's arrival," said Artemis, handing a typewritten sheet of A4 to Juliet.