Dimensions of the A series paper sizes 4A0, 2A0, A0, A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10 in both inches and mm, cm measurements can be obtained. Popular paper sizes and printing formats: A0, A1, A2, A3, A4, A5, A6, A7, A8. An A5 piece of paper measures 148 × 210 mm or 5. The A5 is mainly used for the creation of booklets, leaflets, flyers. A5 measures 148 × 210 millimeters or 5.