Glacier Bay 81187 is an oval/shaped mirror that can be hung vertically or horizontally, depending on your preference. It has a dimension of 21 x 31 inches for the oval mirror and 23 x 28.5 inches for the shaped mirror. The mirror is easy to install with the included hardware and can be mounted on a flat surface or on wall studs. Use a soft cloth and glass cleaner to clean the mirror, avoiding harsh abrasives.