I get this question all the time – almost every day! There are a number of different descriptions for grand pianos and it can become confusing. The thing to keep in mind is that all the terms associated with grand pianos are general terms – different companies have different sizes for pianos so classifying them in general terms is necessary.
For example, Steinway makes a 5’ 1”, 5’ 7”, 5’ 10.5”, and then 6’ 2”. On the other hand, Baldwin pianos manufactured 5’ 2”, 5’ 8”, and 6’ 3”. These sizes are all different and each company has their own unique sizes and scale designs. To classify them in the market we use general terms that can be applied to any brand.
There are a few pianos below 5’ and these are called Petite Baby Grands.
Any piano around 5’ to 5 1/2′ is considered a Baby Grand.
Larger 5’ range pianos, such as 5’ 7” and 5’ 8” are sometimes called Parlor Grands.
Pianos from around 6’ up to around 6’ 9” are called Grand Pianos.
6’ 10” up to around 7 1/2’ are called Semi Concert Grand Pianos.
The largest pianos are typically 9’ and above and are called Concert Grand Pianos. (Steinway Concert grand is 1” short of 9’)
If you ever get confused when looking for a piano feel free to refer to this list or email me directly Robert Estrin Robert@LivingPianos.com