Find out the subtle differences that vary from one maker to another.īelieve it or not, piano hammers are really varied. But what does this actually mean? What do people research when they say that they’re examining a piano? Isn’t a piano just a piano? This series of 5 articles gives a foundation of components in piano manufacturing. I’ve heard this statement many times before: “I’m just doing my research on what piano to buy”. Assuming that most pianos have 88 standard-sized keys, piano width is similar. Upright pianos are qualified by height and grand pianos are measured by length. For a detailed description of each size, click on the desired size of piano. There are 4 common sizes of upright pianos and 6 categories of grand sizes available.