Size it up or down to suit the pen size, the letter size, and the envelope size.
- Print it out on standard paper; cut it to fit inside your unlined envelope so it shows faintly through.
- Print it out onto transparent acetate; lay it and the envelope on a light table.
- Print it out onto stiff paper; cut slots; use it to rule pencil lines on each envelope; erase them once the ink is dry.
With thanks to Katrina Berry
You can lay out the address with each line starting just under the one before, or you can use the slanted lines to start each new line a little to the right of the one before.
Straight lines don't necessarily mean strait-laced designs.
If you don't have to worry about lining up your address, you can give all your attention to making the envelope a one-of-a-kind work of art. Here are two from my archives [not my current address, by now]. For ideas about gussying up your design, go to The Washington Calligrapher's Guild, which offers the winners from their yearly contest "Graceful Envelope" contest. http://www.calligraphersguild.org/envelope.html