Starting from 7 inches and going all the way to 13 inches, tablets now come in a variety of sizes and shapes. Heck, even the iPad has three sizes when the iPhone only has two. As such, it’s more difficult than ever to figure out which model is the right one for your needs.Naturally, deciding on size is primarily about knowing what you want to do with it. However, there are other factors too. If you have a smartphone, it’s size plays an important role in picking the size of an accompanying tablet. The same is true if you have a laptop. The aspect ratio of the tablet also plays a part.