printing pauls guages

[89sei89dx]

when i open the guages on my computer they are way bigger. can anyone tell me wahht i hhave to do to get them to print on the printer the righht size. and what size that would have beeen for u. i know it says thhey come out to 300x300 dpi but i need to figure out thhe size to print them so they are the same size as our guages in thhe car. i did it before but waasted alot of ink printing thhen aadjusting and printing till i got it right.

[89sei89dx]

i figured it out holding my clear guage faces up to comp screen. for me its 315x315 dpi tach and fuel temp. and 355x355dpi speedo