Standard paper size dimensions.
A SERIESA0: 841 x 1189mmA1: 594 x 841mmA2: 420 x 594mmSRA3: 320 x 450mmA3: 297 x 420mmA4: 210 X 297mmA5: 148 x 210mmA6: 105 x 148mmDLE: 99 x 210mmBusiness Card: 90 x 55mm