Cymbals are percussion instruments that produce a crashing, ringing sound when struck with a drumstick or mallet. They are made of a thin, circular metal disk that vibrates when struck. The pitch of a cymbal is determined by its size, thickness, and material composition. Smaller cymbals have a higher pitch than larger cymbals, and thinner cymbals have a higher pitch than thicker cymbals. However, cymbals are not considered to be pitched instruments because their pitch is not fixed and can vary depending on how they are struck.