Have you ever heard of ShrinkyDink? It is a special plastic paper that you can draw on and then heat in the oven. They then shrink down and get thicker and make really cute key chains and charms. I drew these myself on the ShrinkyDink and added the key chain to them. So they are sorta laminated. There is a rough side and a smooth side to every ShrinkyDink paper.
I used my old Pokemon Handbook for proportions so I originally drew them to be the size of the pictures in the book. They shrunk to be (well the Dragonite anyways) about the size of three of my fingers put together.