How to scale a small drawing onto a bigger one.
You will need:
A piece of plywood, approximately 5" x 5"
One plywood stick, twice the length of your plywood
A sheet of glass, I use one from a small picture frame
Sharpie
Source of light
A Tripod
If you don't want to be holding the glass, you can build a small holder for it. Cut the plywood stick (of 10" in this case) in half, then glue the two pieces parallel to each other to the piece of plywood. Leave enough space in between to fit the glass. Then drill a hole for your tripod screw.
If you feel like splurging you can print your design on film. But I prefer glass, because it's sturdier, cheaper and reusable.
Using your sharpie trace your design.
If you're happy with it, place it on your tripod. The darker the room the better. You are not going to be able to see too much unless the room is dark. Using your source of light, I use my cellphone, just because the light is sharp and bright. Adjust the height and distance, you can move it backward or forward to adjust the size too.
Using a pencil trace your design.
When you are done with that design, just use some acetone or alcohol to rub off the ink from the glass. And it's ready for the next one.
Enjoy!