There are several wallpaper sizes, 1920×1080 pixels: FHD, 2560×1440 pixels: QHD, 3840×2160 pixels: 4k. 1280×720 pixels: HD and 1600×900 pixels: Semi FHD. However, the preferred size is 1920× ...

If you like a minimal black and white wallpaper, this might be the best pick. It offers a unique fingerprint pattern along with a dramatic grayscale skin of shadow falling down on your child.