The Wish Granting Jewel Amulet itself is approx.  2" x 2.5".  The overall length of the Feng Shui Wish Granting Jewel Amulet is approx. 4.75".  It is made of metal.

Warning: This product can expose you to chemicals, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov