It depends on what you mean. Could you rephrase the question?
Probably some type of piccolo pocket trumpet.
A piccolo trumpet has a higher pitch than that of a traditional trumpet.
Trumpet
A piccolo trumpet is a trumpet with half the normal length of tubing. This allows it to produce pitches much higher than a normal trumpet.
A standard trumpet(not a piccolo)usually has three valves. However, the higher-pitched piccolo trumpet has four.
There are other types of trumpets thata are smaller than a bflat trumpet. Such as, the piccolo trumpet, the pocket trumpet, and other smaller things like these.
You must be referring to the Piccolo Trumpet.
It is half the size of a regular trumpet.
The key of a piccolo trumpet is usually in B-flat or A. It differs from a standard trumpet in that it is smaller in size and has a higher pitch, producing a brighter and more piercing sound.
Trumpet and piccolo trumpet (smaller, but less common) are the smallest brass instruments.
Trumpet or piccolo trumpet (less common).
their is a G trumpet. F trumpet B flat trumpet and a Piccolo trumpet being the smallest trumpet and an octive higher than a regular trumpet.