The jade bi is a circular ornamental object of great importance among ancient Chinese jade artifacts. It was used in rituals, ceremonies, as gifts, and for decoration, and is considered a spiritual symbol and the embodiment of aesthetics in Chinese culture. Diameter: approximately 20cm, Thickness: 1.8cm Please feel free to browse my other listings. I welcome bulk purchases and will offer discounts. Returns, refunds, cancellations, and complaints are not accepted.