MATERIAL: Acrylic, Not Glass, Not Plastic. (Specially treated Polymethyl methacrylate). 100% new and high quality. Environmental protection.Easy to apply & remove, not reusable.SIZE: 5 different sizes, a total of 56 pcs. Size: 14cm(4pcs); 7cm(8pcs); 5cm(12pcs); 3cm(8pcs); 2cm(24pcs). DIY your creativity and family style;Round is the most beautiful graphic plane.GOODWILL ADVICE: You can use TV backdrops, rooms, children's rooms, ceilings, bathrooms or more. There is a protect film on the surface. Please tear it off after pasting mirror sticker on the wall. It looks very shiny.