* Costume Jewelry. * The polyhedral locket pendant measures 18mm in diameter. * The necklace chain is 78cm long. * The pendants glow green light in the dark. * These Glow in the Dark products Glow out light only after they absorbed enough light. So please make sure that you have put these Glow in the Dark products under the light to absorb light before you enjoy their light in the dark. The longer they exposed, the stronger they Glow. * UV-light works great with glow in the dark items. Also the pendant be highly glowing, you only need to put under normal LED or sunlight!*Important Shipping Information: Please kindly be aware that item is from China and it may takes 7-15 days to arrive. We are trying our best to ship and upload tracking number as fast as we can, we do everything under our control to make the shipping faster! The parcel is transported by China Post. It will be transport by USPS when it arrives at USA. So there is no information in USPS website before the parcel arrives at USA. You could get post details from www.usps.com a few days later. With any question, please do feel free to contact us, we are always with you and ready to help!