Tablets are typically thinner and lighter than traditional laptops and ultrabooks, but still large enough to comfortably perform tasks that are more difficult on a smartphone screen. In addition to the quality of the screen and operating system, size and weight are important factors to consider when purchasing a tablet.

There are five common screen sizes available for tablets, though specific models vary in their exact dimensions. The advertised size of a tablet reflects the diagonal measurement of the screen, so two 10-inch tablets could have slightly different aspect ratios. Some high-end devices, such as the Samsung Galaxy View, have screens larger than 18 inches. Still, most tablets fit into one of the following categories:

The height and width of a tablet are determined by the size of the screen. The size and shape of a tablet affect its portability and how easy it is to hold in different positions. Most tablets are too large to carry in a pocket, but most will fit in a purse, briefcase, or backpack.

Manufacturers typically list the dimensions of their tablets. They often include sketches or images to show how height and width relate to physical features on the device, such as cameras and home buttons.