Convex mirrors are very effective decorating elements in hallways. Whether your hallway is large or small, you choose a large or small mirror, the visual experience can be quite pleasing. Sometimes the forced proximity can find the subject immersed in the visual center of a convex reflection. The viewer becomes a central player whereas normally a convex reflection is more about the room than the person.
Another interesting situation is when the hallway is long and narrow. Then an interesting play on perspective results. And finally idiomatic of mirrors a convex mirror will bounce light and lift the overall light level.
Here are 9 quite different examples of hallway convex mirrors.