Size mm/inches A0 841 x 1190mm 33.1 x 46.8 inches A1 594 x 841mm 23.4 x 33.1 inches A2 420 x 594mm 16.5 x 23.4 inches A3 297 x 420mm 11.7 x 16.5 inches A4 210 x 297mm 8.3 x 11.7 inch