Liquid crystal display monitors, or LCDs, have been a welcome addition to the desktop because they take up much less space than the old CRT monitors, and they maintain a sharp picture for several years. There is no one "standard size," but one size is most common: 19 inches.
As technology evolves and improves, larger monitors become available for the same cost as earlier smaller monitors. However, 19-inch monitors (measured diagonally) have been common for quite a while.
5:4 vs. 4:3
A 19-inch monitor typically has a resolution of 1280 x 1024 pixels, if it has a "5:4" shape. This means that for every 5 vertical pixels, it has 4 horizontal pixels. A "4:3" monitor at this size will usually be 1600 x 1200 pixels.
If you have a newer 19-inch monitor, however, it will usually be in a 16:9 or 16:10 "widescreen" format. In this case, a 16:10 monitor will have a resolution of 1440 x 900 pixels.
Evolving Retail Options
Manufacturers have introduced larger models as costs have come down. You will now commonly find 22-inch and 24-inch 16:10 monitors (5:4 monitors are rare at this size). A 22-inch may have a 1680 x 1050 resolution, but most have a 1920 x 1200 resolution.
Higher-resolution monitors are advertised as "full HD," meaning they are capable of displaying 1920 x 1080 high-definition video (commonly called "1080p" in this context), as from a Blu-ray movie.
LCD Size Reference Guide
With the advent of liquid crystal display (LCD) televisions, as well as other high definition (HD) televisions, the shape of televisions has...
How to Pick an LCD TV Screen Size
Picking the appropriate screen size for a new LCD television can be an exercise in futility. Many consumers are confused about how...