Repositionable, reusable, self-adhesive sign holders help administrators and teachers quickly and easily post and update signs on any wall, window, or solid non-porous surface without using any hardware or leaving sticky residue. These reusable sign holders let you switch messages in a flash and can go just about anywhere. Because they could be stuck easily to just about any flat surface, these sign holders are perfect for retail stores, government offices and anywhere the public gathers.