I went through this last year with our new boat. I found this site where you can put your numbers in and then select different fonts, shadow effects, colors, etc, and see what they will look like. Then I went to a local sign place and ordered the numbers in the font. I think the 3" letters cost .75 each and I needed 16 letters per side, 8 for the number and 8 for the shadows. They put them all on a single backing so I just had to slap it on and squeegee the air bubbles out. Go to this site and use the boat name section if you want to use shadows or other 2 color effects.