Window Perf is an adhesive-backed, perforated synthetic substrate . It is designed to let you put your printed message on a window visible from the outside but still be able to see out from the inside. You can use it on architectural glass and side or rear automotive windows. For automotive use, please check local regulations. Color: 4/0 full color printing on one side Sizes from 1' x 1' to 150' by 53" (inches) Lamination: If using Window Perf for an automobile, we highly recommend lamination to keep dirt out of the holes. Window Cling is either light adhesive-backed or designed to cling by using static and prints in full color on one side. It is designed for display on window glass, though you can also use it on other smooth surfaces. Color: 4/0 full color printing one side Sizes: 1' x 1' to 75' by 52" (inches). Be sure to check local zoning and vehicle codes before applying. Due to material, all substrates may expand or shrink from batch to batch, which makes exact cuts very difficult. We do not recommend borders. If you would like borders, please make sure they are at least 2" thick. Borders may not be exactly the same on all sides after cutting.