The sopranissimo or soprillo saxophone is the smallest member of the saxophone family. It is pitched in B, one octave above the soprano saxophone. Because of the difficulties in building such a small instrument—the soprillo is long, with the mouthpiece—it is only recently that a true sopranissimo saxophone has been produced. The keywork only extends to a written high E (rather than F, F♯, or sometimes G, like most saxophones) and the upper octave key has to be placed in the mouthpiece.