Printing at Exact Size

Hi everyone. I'm a long time linux user, and I'm sure I could muddle through to something that works, but if anyone knows the answer, that would be really helpful.

I want to print out a template on a piece of paper and I want the paper to be exactly the right size. I mean, if the template says 2 inches I want it to be exactly 2 inches on the paper when I print it out.

I'm trying to make a rudder with the NACA 0012 airfoil.