What about small groupings?
Glad you asked! The same rules apply, but there are two ways to go about this.
Here’s the first option: let’s say you have six pieces of various sizes and want to hang them in a group. You’ll want to choose one piece to be the focal point (the largest), hang it at 57in on center, and group the others upward and out to the side (don’t go under it. Don’t you do it!).
The second option: measure 57-63in up from the floor and make a light mark on your wall. Then start hanging your art around that specific spot, always going up and out. This option usually works best for a smattering of smaller pieces, like 8x10s of your favorite politicians and/or family members.
Bigger is better over beds and couches
If you’re wondering what you should hang above a bed or a couch, go big. Also, let it roll solo and don’t put anything else around it. These larger furniture pieces take up a lot of space in a room, and having one large frame centered above effectively creates a clean focal point that will keep the room from feeling cluttered.