These are natural turban shell shells. They have been bleached, washed, and dried. Although washed, there may be some dirt or sand that couldn't be removed. The shells are in their natural state and have not been processed in any way. As they are natural products, there may be chips in the shell openings and spines, scratches, imperfections, calcification, and barnacles attached. Please note that measurements are approximate due to being taken by a non-professional. They will be delivered via Yu-Packet Plus. There is a possibility of cracking or chipping due to impact during transportation. Please purchase only if you understand and accept all of the above. Thank you for viewing.