Here’s how you pick the best screens for a multi-monitor setup in the internet’s favorite format, a numbered list. Pick two monitors of the same size, and they’ll look good next to one another. Pick two monitors of the same size and resolution, and they’ll fit perfectly. Most monitors use the standard 16:9 these days — that’s the same shape LCD televisions have been using for over two decades. Ultrawide monitors stretch out to 21:9, or sometimes even 32:9 (that is, two standard monitors side by side) for the gigantic screens.