On same documents, this happens on my school Canon laser printer, and my home (Xerox) printer!
When I type a Word document (8.5x11), and try to print it on 8.5x11 paper, it comes out about 40% smaller than the document looked on my screen. I set the paper size correctly, but now it says "the paper in the printer does not match the paper size of the document". How do I get this to print the document the way it looks on my screen? With some documents it does--with others, it shrinks to 60%.