The length and width of a 50-inch television depends on the space devoted to the bezel, but a 50-inch wide-screen with a 16:9 aspect ratio measures 43.58 inches wide and 24.51 inches high. A standard-width 4:3 aspect ratio screen measures 40 inches wide and 30 inches high.
For other sizes of screens, the factors 0.8 and 0.6 can be applied to the diagonal length to determine the width and height of a standard screen with a 4:3 aspect ratio. For wide screens with the 16:9 aspect ratio, the factors 0.87 and 0.49 are used. A typical bezel adds another 3 to 5 inches to the screen size.