What are the correct names for the different sizes of grand piano?
There is no standardized naming scheme for grand pianos. Sometimes you will hear romantic-sounding names like parlor grand, but there is nothing official about such names. I use the term small grand for those under about 56, medium grand for those between about 56 and 76, and concert grand for those larger than 76 (most of which are about 9). Note that piano technicians do not usually use the term baby grand, even though this is a popular consumer term.