Are the keys on a spinet piano the same size as an upright or grand piano?
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Yes, the keys of a spinet piano are the same as other upright or grand pianos. However, the keys on Asian pianos are slightly longer than keys on American pianos. Also, there are some late 19th century pianos which have keys which are slightly shorter still, particularly pianos which had been player pianos. Black keys have slightly different angles in the front on some older pianos as well. The edges of black keys are sometimes more rounded in older pianos because they get worn from playing. The spaces between white keys also become larger over time from wear as well.