Getting correct image size from Eagle PCB

So, having issues getting the correct print size from Eagle PCB on printer.  These steps seem to work for me

• Create the board in Eagle
• Turn off all layers except those wanted, ie Top, Pads, Vias
• File -> Export -> Image
  • Resolution: 600
  • Select Monochrome
  • Give a file name
  • Click OK
• Open file in Gimp
  • Image -> Crop to Content
  • If need to invert image, ie Top mask overlay (Flip Horizontally & Flip vertically), Colors -> Invert
• Save modified image
• Print
  • Page Setup tab
    • Ensure scale is 100%
  • Image Settings tab
    • Draw Crop marks (if needed)
  • Color Tab
    • Monochrome
  • Advanced
    • Print Scaling: None
    • Print Optimization: Graphics
  • Press Print