A concert grand piano is a large, high-quality piano designed for professional performances. It typically measures about 7 to 9 feet in length and features 88 keys, which provide a wide range of musical notes. The construction includes a wooden frame and strings, allowing for rich sound and dynamic expression. These pianos are often used in concert halls and by renowned musicians, making them a staple in classical music. Brands like Steinway & Sons and Yamaha are well-known for producing concert grand pianos, which are favored for their exceptional sound quality and craftsmanship.