You can comfortably view a 24-inch TV at around six feet (1.8 metres) away, so they're great for a bedroom or kitchen, or if you don't want your television to dominate your living room.
If you're after a slightly larger second TV for a bedroom or kitchen, the optimum distance for a 32-inch TV is about 7 feet (2 meters).
Moving into the realms of medium-sized TVs, a 40-inch set could be a good main TV if you don't want it to dominate, or an extravagant second TV. Best viewed at 9 feet (2.45 meters) away.
At the upper end of the 'medium' scale, modern 48-50-inch TVs are slimline enough not to appear overbearing, and could be a good choice if you typically sit around 9 feet (2.6 meters) away.
Thanks to modern, slimline designs with small bezels, 55-inch TVs are more popular than ever. Ideal if you've got your feet up around 11 feet (3.3 meters) away from the screen.
If you're really pushing the boat out, or you have a large room and sit about 13 feet (3.7 meters) away from the screen, these extra-large sets have really come down in price.
Looking to take things to the extreme? There are a handful of TVs around larger than 65-inches in size, though you'll need to be at least 14 feet (4.2 meters) away for the best experience.