The dimension of the amulet is approx. 2.125"x 2.375"x 0.25". The length of the whole keychain is approx. 5". It is made of misc. Depicting the 5 elements, this Feng Shui balancing keychain is believed to counteract zodiac clashes and strengthen those elements missing from one's Paht Chee chart. Therefore, it is highly recommend to keep this amulet close by to activate your full potential and bring in good luck. The dimension of the amulet is approx. 2.125"x 2.375"x 0.25". The length of the whole keychain is approx. 5". It is made of misc.