"Make your own drum (or any shape!) lamp shades with this 15\"x 52\" peel-off, self-adhesive, white pressure sensitive styrene. Use it to back handmade papers, fabric, posters, maps, wrapping paper, or whatever you would like to laminate for a hardback shade. This strip will make up to a 16\" drum shade, as high as 15\". It will make two shades if they are only 7.5\" high. To figure out what length styrene you need for your rings - take the ring diameter and multiply by 3.14, and add one…