Grand pianos have been built in virtually every size over the past three hundred years, ranging from around 4 1/2′ to 10′ long. Today, 4′ 10″ to 9′ is the typical range.
Modern Grand Piano Sizes
Petite Grand Pianos are shorter than 4′ 11″ (sometimes called miniature)
Baby Grand Pianos – 4’11” to 5’2″
Medium Grand Pianos – up to 5’9″
Full Grand Pianos – up to 6’6″
Semi-Concert Grand Pianos – up to 7’6″
Concert Grand Pianos – anything over 8’10”