Antiqued bronze plated base metal cast Asian Ba Gua coin charms, approximately 16x13mm. Replicas (reproductions) of a traditional coin-shaped charm with the eight trigrams of the I Ching, arranged in an octagon around a yin / yang symbol. This shape, especially when combined with a mirror, traditionally helps ward off evil. In feng shui, the ba gua (also bagua or pa gua) is the energy map, which helps map out auspicious placement of items in a given space, such as a home or workplace This 16x13mm two sided charm is approximately 1.5mm thick. Charm measurements include loop.