Tim Holtz masks are amazing! A mask is the opposite of a stencil. This flexible material has a lightly tacky repositionable backing and will hold its placement as you paint so you can create backgrounds easily. Full instructions are on the back of the package. Masks are reusable and washable. These designs are made from die cut vinyl and backed with repositionable adhesive so you can use them again and again. Apply inks, paints, sprays, or a variety of other mediums over them for effects unlike anything else you've ever seen. Get ready for a new addiction! The concerto mask measures approximately 11 inches long x 4 inches wide. Great for music lovers! Watch Tim Holtz demonstrating masks on YouTube - type the following into your address bar: http://www.youtube.com/watch?v=Cpswkp9_npM&feature=player_embedded