The best way to choose the right wallpaper for your tablet is to start with the resolution. Typically, the resolution is stated in terms of width and height, which can be easily determined by the size of your display. A 1080p tablet, for example, has a resolution of 1080 x 2400. For this device, the first number is the height, and the second is the width. When you look at the wallpaper size, it should be around 3MB.