A4 Size - 210 x 297 mm / 8.27 x 11.60 inches A4 measures 210 x 297 millimetres or 8.27 x 11.69 inches. In PostScript, it's 595 × 842 points. A4 is part of a set of page sizes recognized worldwide as the ISO A or ISO 216 standard. These international paper sizes are based on the German DIN 476 standard from 1922.