There are Sizes available from A3 to A0 :

Dimensions:

  • A3 = 16.5   x    11.7 inch
  • A2 = 23.5  x   16.5 inch
  • A1  = 33     x  23.5 inch
  • A0 = 46.8  x     33 inch
  • A3 = 42 x 29.7 cm
  • A2 = 59.4 x 42 cm
  • A1  = 84 x 59.4 cm
  • A0 = 118.9 x 84 cm