size: The total length is about 6 ~ 7.5 inches (15cm ~ 19cm) There is an extension chain to adjust the length by yourself. Material: Zircon, copper **Storage methods and precautions** 1. All jewelry is fixed by the inlay method (claw inlay) of traditional jewelry. It is not using adhesives. The inlay method is classical and beautiful, and it also makes the gemstone more firm and fixed. To prevent the diamond from falling off. 2. If you need to clean, you can use salad off and soft toothbrush to clean the jewelry. After finishing, wash it with clean water and dry it with a cold wind with a hair dryer before putting it in a chain bag. 3. When storing and wearing jewelry, try to avoid contact with water, sweat, detergent or lotion to avoid accelerated oxidation. 4. It is recommended to sterilize the cotton ear pads before and after use. Keep the junction between the ear pin and the copper jewelry dry. 5. Jewel plating and electroplating products will fade with the number of uses and the environmental pH value. After fading, the color can only be restored by re-plating. 6. It is not appropriate to wear it for bathing, swimming and hot spring bathing. 7. Most copper jewelry has a soft texture, such as long chains and thin chains, etc. should be avoided. Rings or bracelets are not recommended to adjust the arc, open or bend the jewelry. 8. In case of any phenomenon not stated in the instruction manual, please contact the customer service staff, we are happy to provide consultation, maintenance and other services for every Miss Mist.