These images satisfy three criteria: They are Commons featured pictures or English Wikipedia featured pictures.

They are fairly large

They have an aspect ratio of 4:3 or 5:4 They are therefore likely to be good desktop backgrounds (wallpaper). To check aspect ratio, go to the properties of the image, and then divide its height by its width. If the resulting number is 0.75 or 0.8, then it's the ratio we want. Anything between 0.71 and 0.84 is tolerable. See table. To put an image in this category, add {{Wallpaper}} to its description page if it is featured on Commons or {{Wallpaper-en}} if it is featured on the English Wikipedia (but not on Commons). See also: Widescreen desktop backgrounds