Magic Whiteboard Products Magic Blackout Blind - 80% Blackout (MW4210) Blacks out 80% of the light. Sticks with static to any flat surface Each sheet can be put up and taken down over and over again Roll out an entire roll to black out a window up to 26 feet long, tear off one 23.5&quot;x31.5&quot; sheet, or cut the sheets to fit any window Each roll includes over 50 square feet of blackout blind, which is enough to cover approx. 5 standard windows Ideal for blacking out the light in nurseries, boats, RVs, home theaters, dorm rooms and anywhere else, Ideal as a temporary room darkening solution