Google has launched a new Google Labs experiment called Browser Size, which is a tool aimed at helping webmasters see how others view their site. Google’s official description of the tool says:
Ever wondered what parts of your site can’t be seen without scrolling? Browser Size shows you what portion of users can see a give spot on the screen. This is not screen resolution but the area available to the browser – as gathered from www.google.com users.
Here is what it looks like: