For the weird size stencils, I took a picture and the demnsions and took them to a small sign company that makes plastic signs. The put the pictue in the computer, sized it and then cut the stencil on a stencil paper, put tape on both sides. When I go to use the stencil I peel off the back and stick it on the truck, I then peel off the front and there is the stencil, I then paint it, I let it dry and then peel off the stencil. Perfect stencil no run off. This is expensive but the results are great. The stencil is a one time use.. Another way to do it.