Grand Piano

In grand pianos the frame and strings are horizontal, with the strings extending away from the keyboard. The action lies beneath the strings, and uses gravity as its means of return to a state of rest. Grand pianos range in length from approximately 1.5 meters (4 ft 11 in) to 3 meters (9 ft 10 in). Some of the lengths have been given more-or-less customary names, which vary from time to time and place to place, but might include:

Baby grand – around 1.5 meters (4 ft 11 in)
Parlor grand or boudoir grand – 1.7 to 2.2 meters (5 ft 7 in–7 ft 3 in)
Concert grand – between 2.2 and 3 meters (7 ft 3 in–9 ft 10 in))