The most common wallpaper size for desktops is 1920×1080 pixels, called FHD (full high-definition), with a 16:9 aspect ratio. Other popular wallpapers include 2560×1440 pixels (QHD) and 3840×2160 pixels (4K). The older HD resolution of 1280×720 pixels and the semi-FHD 1600×900 are not as popular anymore.