This is an unusual size to find and it fit perfectly between the studs. I purchased this to be placed in the wall behind the bathroom door for better viewing of the back of my hair. The mirrors over my vanity are not medicine cabinets. I thought this would fit more flush with the wall but there is a slight protrusion. The first one that arrived had a shattered mirror. When I notified Wayfair they immediately sent a replacement free of charge. It is a light weight cabinet so I am not sure how long it will last but it is doing what I wanted it for.