If authenticity is what you require, than the Donkey Jaw Bone Rattle is just the thing for you. Also called a quijada, it has a sound unlike any other rattle you've ever heard! As these are natural, sizes will vary. Generally, overall length is approximately 16 inches, with an average width of 7 inches. Played by striking the upper part of the jaw with the back heel of your hand while holding the end of the jaw.