A GRAND piano is a large, full-sized instrument with a rich sound. It is the most common type of piano used in classical music and is typically found in concert halls. An UPRIGHT piano is a smaller version of the GRAND piano, but still has a full-sized keyboard. It is often used in homes and churches. A SPINET piano is even smaller than an UPRIGHT and has a shorter keyboard. It is usually less expensive than other types of pianos. Finally, a baby GRAND piano is a small GRAND piano that is slightly larger than an UPRIGHT. It has a full-sized keyboard and produces a sound similar to a GRAND piano, but at a lower volume.