With all the different sizes and shapes of monitors these days, it's sometimes difficult to find wallpaper that perfectly matches your desktop resolution, but weblog Digital Inspiration points out that Bing's image search makes it really simple.
While you can manually search for images with a specific resolution using the same imagesize parameter that you can use in Google, Bing's image search can filter by your desktop resolution in a single click — just perform a search, and then choose Size -> Wallpaper from the filtering options on the left menu to filter your search by your current resolution. One of the other benefits of using Bing to find wallpaper is the never-ending "river" of images, so you can just keep scrolling down and it will load in more results.
The Digital Inspiration article also talks about how you can use the same tip to find perfect-sized wallpaper for your iPad, iPhone or other mobile device, by accessing the desktop version of Bing instead of the mobile one.
Find Perfect-Sized Wallpapers for your Mobile and Desktop with Bing [Digital Inspiration]