Eagle printed PCB scale problem
In order to produce scale-accurate print you need to print the drawing from Eagle. For example, in board editor go to the top menu and select File->Print.In the window that follows pick your options. Scale factor will be one by default. You can also print to PDF from there but then you'd have to be careful with PDF renderer as they all tend to rescale in order to fit the image to the page.

I always check my footprints using the above method and it proved to be quite accurate.