The soprillo is the smallest saxophone, developed as an extension to the saxophone family in the late 1990s by German instrument maker Benedikt Eppelsheim. It is 33 cm (13 in) long including the mouthpiece, and pitched in B♭ one octave above the soprano saxophone.
Soprillo
The soprano saxophone is a higher-register variety of the saxophone, a woodwind instrument invented in the 1840s. The soprano is the third-smallest member of the saxophone family, which consists of the sopranissimo, sopranino, soprano, alto, tenor, baritone, bass, contrabass saxophone. Soprano saxophones are the smallest and thus highest-pitched saxophone in common use.
Soprano saxophone
Comparison in size of a curved B♭soprano saxophone (centre), an E♭alto saxophone (left), and a B♭tenor saxophone (right)
Top to bottom: a curved E♭sopranino saxophone, a straight E♭sopranino saxophone, a C soprano saxophone, and a B♭soprano saxophone
B♭soprano saxophone (left), C soprano saxophone (center), E♭sopranino saxophone (right)