How to Size a Cello - This article explains how to choose the proper sized cello.
Seat the child (or yourself) so that the knees are bent at a ninety degree angle. The instrument should rest such that the upper rim of the cello body rests on the sternum (breast bone), and the left knee contacts the curve below the lower bout corner. The C string (the lowest string) peg should be near the left ear, with the neck a few inches away from the shoulder, and the left hand able to reach both ends of the fingerboard with ease.
We suggest full size for adults, call or e mail for help sizing children. Remember, we always offer top trade in value when moving up to the next size instrument.