Everyone knows that Google Image Search sports a drop-down menu for filtering results by small, medium, large, and extra large sizes, but if you're looking for the perfect wallpaper, for example, the
imagesize operator is even better. Weblog Google Operating System uncovers the undocumented search operator (that's also new to us) and demonstrates how to use it. Just use the
imagesize operator followed by the WidthXHeight in pixels, like so:
Here's an example: [imagesize:640x480 muffin]finds 640px x 480px images related to muffins.
As the post points out, the imagesize operator is perfect for finding wallpapers that are the perfect fit for your screen.