For vehicles with metal body panels. 4/0 full color on one side 30 mil white magnets. Size from 12" x 6" to 60" x 24" The substrate includes tiny air channels for smooth and easy application. 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. The the borders may not exactly be the same on all sides after cutting.