The simplest way to measure a grand piano is to put the lid down and measure the longest point perpendicular to the keys. The baby grand size of piano is the smallest of all grand pianos measuring 4’9″ to 5’4″ in length (1m 45cm to 1m 62cm). This string length approximates that of a professional level upright piano 48″ in height. (See the string length chart in the article What Size Piano Should I Buy?) I’ve been asked many times what the advantage is of a grand piano over an upright piano, especially if you’re comparing models with equal string length. From the pianist’s perspective there are 2 distinct advantages of grand pianos. The first is that you hear more. While any upright piano projects against a back wall and the tone you perceive is predominantly reflective tone, grand pianos deliver sound waves from the soundboard directly in front of you. For an even more transparent experience, try putting the music rack down and listen. It’s truly incredible. The second reason is the action. The system of levers that make up the action vary greatly from a grand piano to an upright. The grand is more ‘finessed’ ~ it has more adjustments that can be made to fine tune a grand action.
Baby grand pianos are magnificent in their display, beautiful to play on, beautiful to listen to and add flair to any home decor. For more information on piano sizes, please refer to the Piano Price Point article What Size Piano Should I Buy?


There are 4 common sizes of upright pianos and 6 categories of grand sizes available. For a detailed description of each size, click on the desired size of piano. Upright pianos are qualified by height and grand pianos are measured by length. Assuming that most pianos have 88 standard-sized keys, piano width is similar. Depth of upright pianos range from 21″ to 27″ (52cm-67cm).