Paper sizes in series A

The A series of paper is the most commonly used worldwide, with only the US and Canada (some parts of Mexico) not currently conforming to the ISO 216 (international standard).

  • The A3 paper size is 297 mm x 420 mm or 11.7 x 16.5 in.
  • The A4 paper size is 210 mm x 297 mm or 8.3 x 11.7 in.
  • The A5 paper size is 148 mm x 210 mm or 5.8 x 8.3 in.

All paper sizes in millimeters and inches

Read more about the different papers:

Other paper sizes

Click if you are looking for measurements and information about B size papers or paper sizes in the US standards (used in Canada and Mexico also).