listed are all the common sizes that are used in printing and in the office. all sizes are in millimeters and are width first.
A5 - 148 x 210 A4 - 210 x 297
A3 - 297 x 420 A2 - 420 x 594
Compliment slips - 210 x 99
Business cards - 85 x 55, 90 x 55
Common terms 4pp - the "pp" means the number of pages bleed - the distance the job is printed over the final size. eg a job printed with a 10mm bleed will exceed the final page size by 10mm all round to allow for cutting. NCR - "No Carbon Required" This special paper allows multiple copies of a form to be created at the same time without the need for carbon paper.