The modern transverse flute, held parallel to the floor and blown at the side, is about 25 to 26” (63.5-66 cm) in length with a bore of about 3/4” (2 cm) and is made of one of several materials: nickel silver (which is essentially copper) with silver plating on the surface, sterling silver through-and-through, or sterling silver which is gold plated, or gold throughout, typically between 9k to 14k. The foot joint allows the player to achieve down to middle-C as its lowest pitch (aka C-foot) or B a half-step below middle-C (aka B-foot). Professional players typically play with at least a sterling silver instrument with opens holes and a B-foot joint.