Screen Size: 100” 125x220cm/ 49.21x86.61inch. Projection Proportion: 16: 9. The black back ensures that no light is lost and the projection is clear. Matte white viewing surface diffuses projected light uniformly,The projector screen is suitable for both Wall and Ceiling mounting requirements. TIPS - There maybe wrinkles on the projection screen due to long time rolled-up. Please hang the screen for some days or use garment steamer to iron the wrinkles if you need to use it right now.