The Modern Square Bathroom Mirror is 31.5 inches on each side with a clean glass edge and no frame to compete with the room. Square is the shape that most often gets skipped and most often turns out to be right: it lines up with a vessel basin, it does not stretch a low ceiling, and it hangs the same way whichever side is up. Choose it when the bathroom already has a strong material story and the mirror should stay out of the way.