The main unit of measure on a computer is pixels. Most icons on a computer are 16x16 pixels by default.
If you mean the screen size, then it is measured by the diagonal of the screen from corner to corner.
Each screen is 3.25 inches (measured diagonally).
it is measured in speed because of how fast it can transfer to the screen
Lenth
If you mean a TV's actual size, you measure the screen diagonally
Characters per second.
When you change the font size, the size of the characters on the screen will change in size. The characters will appear larger or smaller depending on how you adjust the font size.
Sony NWZA728 has a 2.4" LCD screen measured diagonally
Manufacturers measure monitors by screen size. The measurement is taken diagonally, from the bottom left of the screen to the top right corner of the screen.
VDU, which stands for Visual Display Unit, is measured in inches. It refers to the size of the screen of a computer monitor or television.
This laptop features a standard 15.4" diagonally measured wide screen display as per the manufacturer.
The font size.