A4 = 1063*744 pixels @93dpi
but if u usin AuotCAD, then u need not mention paper size in pixels
all plotters/pinters have A4 as standrad paper size
*img411.imageshack.us/img411/5387/13887987ou9.th.gif
OFFTOPIC
A trick that we use
if the place where you take CAD printouts charge more than from where you take normal printputs, then just save the file as a pdf file and take the printout from latter place