A medium-sized gaming monitor is between 23 and 25 inches in size. The best-known size in this segment is 24 inches, which is quite small for gaming. If you're playing a game where size isn't all that important, such as World of Warcraft, 24 inches is a good and affordable option. Especially if you don't have too much space on your desk. For shooters, racing games, or a more intense gaming experience, you better choose a larger screen, such as 27 inches. With a 27-inch monitor, you can immerse yourself in your games and see more of the playing field.