Alcoves are the easiest and affordable tubs you can buy and install. But you pay the price with sizing, as most alcoves tubs and only 60 inches long. This tub fits in a three-walled enclosure. When the walls are tiled or fitted with panels, the enclosure can be used for a tub/shower combination. The alcove bathtub is all about maximizing your it's the tub with the smallest footprint.