Yin Yang Eight Trigrams BA GUA Amulet Black Agate Magic Gemstone Circle Spiritual Powers Pendant Necklace Comes with Detailed Information Card and cute Velour Pouch Gemstone Circle Size: 2 inches (50mm) Gemstone Circle Size: 2 inches (50mm) Each Magic Symbol is Engraved on top of the Gemstone Circle Comes with Adjustable cord, and adjusts from 15 inches up to 24 inches