A 27-inch monitor is considered large. If you convert it, 27 inches is 69 centimeters. You can also choose 28 and 29-inch monitors. A large screen is especially suitable if you game a lot, because you'll see more of the game. A large monitor can also offer a solution for professional photo or video editing. If you work in multiple windows at the same time, you need a lot of screen space as well. Keep in mind that a larger monitor also requires a higher resolution to transfer sharp images. A large Full HD monitor can look a bit grainy up close.