If you have a relatively old TV you can actually buy almost anything because the technology has developed enormously over recent years, and even cheap TVs are very good now. At the same time you obviously want the best value for your money, so it’s a good idea to read our expert tests to get a better idea of what’s gone on since you last bought a TV.
One old rule of thumb is 10 inches per metre you have between you and the TV. So in other words you need a 30 inch TV if you're 3 m away and so on. Today large TVs are relatively common and cheap so you can easily break that rule. At the same time, you need to take into account the room where the TV will be, your budget and your own personal preference.
TVs – and screens of all types – are measured in inches (1 inch = 2.54 cm), diagonally across the screen.