Hi Fred,

The word pixel is derived from picture element and is a single point in a graphic image. The size of a pixel in inches depends on the device being used to display the image. There is a really nice page that describes this at scantips. This page captures the resolution of your monitor and displays a rectangle that is 500 pixels wide and 200 pixels high. If you can change the resolution of your monitor or look at this page on two monitors with different resolutions you will see that the size in inches of the rectangle is different for different resolution monitors.

Penny