Filter out Blue Light and relieve computer eye strain to help you sleep better. Actual Screen Protector dimensions are 23 inches measured diagonal, 20 inches width x 11.3 inches height. Aspect Ratio 16:09. Please compare your monitor to our measurement picture before purchasing Block Blue light at wavelength at 380nm-490nm. Easy to apply and remove. This package includes 3 screen protectors and an installation kit. Protects screen against scratches and Anti Glare function.