Depending on what size fonts you wish to make, you may size yours differently, but I figured it would be helpful to give the dimesions that worked out for my application.
100.0
Use the stencil maker at http://woodgears.ca/stencil.
I used a Rman font,
font size 480. I added 1 cm
to the bottom of the rectangular
outline and removed 1 cm from
the top to vertically center the letters.
1.25" #6 drywall screw