Steinway & Sons offers over a dozen piano models – of different diapasons (6 1/4 octaves, 6 3/4 octaves, 7 octaves, and 7 1/4 octaves); different scale designs (“common scale”, “sweep-scale”, and “overstrung”); and different case styles (“very plain”, “plain”, “molded”, and “fancy”, with three possible types of corners and various shapes of piano legs).