Display sizes for the web
The display of the web page is governed mainly by the browser and client-side settings. Testing the web page on all browsers, color depths and screen sizes would be very tedious. It is better to access the kind of visitors you expect, determine what settings and browsers they are most like to use and design accordingly. For example, I can assume that visitors to this page are interested in finding things out about web development or design and would probably be using the latest browsers. You are not like to use monitors under 17 inches and many of you may use large format screens to design on, so we have a good a idea about monitor screen size and pixels.