Filter out Blue Light and relieve computer eye strain to help you sleep better. Actual Screen Protector dimensions are 24 inches measured diagonally. 20.9 inches width x 11.8 inches high. 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.