You can hang a horizontal mirror in any room of your home where you want to attain a sleek yet spacious look.
A long horizontal mirror is ideal for above the sofa or in a hallway. A large horizontal mirror is perfect for the space above a mantel or fireplace. In a dining room, hang a horizontal mirror above your buffet table. Used this way, a horizontal mirror will not only add more light but will also reflect the back of a decorated cake, a pretty vase, or flower arrangement.
A horizontal mirror is ideal for adding light and dimension to smaller rooms. If you have low ceilings, hanging a horizontal mirror will open up your wall space without needing much room above or below the frame.
In a larger room, consider hanging a series of long horizontal mirrors on top of each other, with a couple of inches of space in between. Three or four mirrors hung this way will create an impressive geometric design on your wall and add significant depth and luster to your room. Stacked horizontal mirrors make an instant focal point.