Track decals are precision cut from high quality vinyl. Outdoor decals have a glossy finish and are backed with a strong adhesive for durability against the elements. Indoor decals have a matte finish and a gentle adhesive for use on interior walls. The "size" you order is the longer of the height or width of the decal. The sample image has a 0.2" track width for a 6" tall sticker; other sizes will be cut with similar proportions.