Yin and Yang is a concept of dualism, describing how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent in the natural world, and how they may give rise to each other as they interrelate to one another. This unique Celtic dragon yin yang necklace is made of solid hypoallergenic surgical stainless steel. The Celtic dragon yin yang approximately measures (without bail) 35mm in diameter x 1.4mm thick. The bail can accommodate a chain or cord necklace up to 4.5mm wide. The Celtic dragon yin yang amulet has a high-polish with black enamel finish and will arrive ready to wear on a 20-inch long 2.5mm wide stainless steel rolo chain necklace that has an easy-to-use lobster claw clasp.