There is a very simple rule for the size of the A series pages. Markus Kuhn covers it here: http://www.cl.cam.ac.uk/~mgk25/iso-paper.html http://www.cl.cam.ac.u

There is a very simple rule for the size of the A series pages. Markus Kuhn covers it here: http://www.cl.cam.ac.uk/~mgk25/iso-paper.html http://www.cl.cam.ac.uk/~mgk25/iso-paper.html Basically, in metres the An page dimensions are pow(2, (plus or minus)1/4 - n/2) and always round down to the nearest mm.