dimensions of a regular piece of paper
A Series Paper Size Tolerances. ISO 216 specifies tolerances for the production of A series paper sizes as follows: Â± 1 1.5 mm (0.06 in) for dimensions up to 150 mm (5.9 in) Â± 2 mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in)