Pre-cut letters or stickers prepared for application of all types of signs. Great for labels and stickers. For home or office use for those do-it-yourself jobs. Ready-to-Apply (RTA) Vinyl Lettering is the term used for letters that are precision cut with a computer operated vinyl cutter.  These have 3 layers: the vinyl letters are sandwiched between a paper backing on the bottom and a tape mask across the top.