I suppose if you were possessed of a height greater than 6'4" then I just may be considered a shorty to thee. Otherwise I'm fairly certain relativity or no, I am no shorty. ^-^ I am in Gr. 12 though.
It's more commonly called a Baritone, though this is kind of a misnomer. It is kind of like a Tuba, but pint-sized (about 1/3 the size I believe). It's name means smooth-voiced, or along those lines.