START WITH SIZE AND SHAPE
How large is your bathroom and where will the medicine cabinet go? Is storage space an issue? What type of items need to be stored? Medicine cabinets come in a variety of sizes and shapes to match the space in your bathroom. Ensure the proper fit for your medicine cabinet by measuring the area accurately. The medicine cabinet should be at least 1" shorter on each side of your vanity.
Begin by measuring the width of your vanity. Your medicine cabinet should typically be narrower or the same width as the vanity. To determine the height, measure the distance between your lights and faucet. Will you be able to cut into your bathroom wall to install a medicine cabinet? Or do you need a medicine cabinet that can be mounted on the surface of the wall without affecting its structure?
Recessed mount: Sleek and sophisticated
Recessed mount (aka flush mount) cabinets are inset into the wall. They provide a sleeker appearance, looking more like chic mirrors than medicine cabinets. However, installation can be tricky: unless you're simply doing a replacement with a cabinet the same size as your old one, these models require you to cut into your sheetrock. Before you do so, you or your contractor will have to determine whether there is electrical wiring or pipes behind the wall.
Surface mount: Easier to install, still stylish
Surface mount cabinets are installed on the surface of your bathroom wall and jut out. Depending, of course, on style, surface mounts may be less expensive than recessed mounts. They are definitely easier to install, and they are a better choice if you have electrical wiring or pipes in the wall over your sinks that you prefer not to move. Unlike the recessed mount, a surface mount cabinet only requires you to locate the studs in order to evenly distribute the weight of the cabinet. Of course, you'll center the cabinet over the sink; if you only have one stud within mounting range you will simply anchor it with hollow-wall anchors on the other side.