Not many people use this paper pattern method. I've been tinting for over 20 years and have a few old school habits that die hard and using paper patterns for side windows is one of them. This is not ordinary paper, it is "Plastic Coated Freezer Paper" available at the grocery store. In the picture I have cut a piece roughly an inch or so larger than the window and made several cuts along the side to allow it to lay down. You will see what I mean if you try this. Of course the plastic coated side is toward the glass.