We’d recommend one that's between 24 and 30 inches, depending on the size of your desk.As with HDTVs, 1080p resolution is the standard, but if you’ve got a beefy rig, you can move into the WQHD (2560 x 1440 pixels) spectrum without much trouble.
Most monitors you see are between 15 and 32 inches. When you’re looking for the best monitor for gaming, start by considering its size, resolution, and pixel response rate.
For the average set of eyeballs, there’s not much difference from monitor to monitor, but for games, it's all about the details.