The diagonal measurement of a television is 25 inches in height and 44 inches in width for a 50-inch, 16 by 9-inch screen. A popular model, the Samsung EH5000 LED television, has external dimensions of 44.8 inches wide, 26.4 inches high, and 3.7 inches deep. Dimensions vary slightly between manufacturers and models.
In addition to the physical area a television occupies, the viewing distance should also be considered when selecting a set size. Digital Trends suggests a 50-inch screen for optimal viewing between 6.25 feet and 12.5 feet away.
James P. Mitchell invented the world’s first LED flat panel television screen in 1977, however LED televisions were not made available to the general public until the debut of the Samsung LN-T4681F in 2007.