Description:The ring is made of high quality alloy, friendly materials, harmless to the human body. Design concept: Everyone has the joys and sorrows, everyone want to express themselves, when you are happy, you can share the happiness to others, when you are sad, hope to get someone else's understanding.The mood ring not only can bring you more good luck, but also can make your love more happy and sweet. And the mood ring unique color changes, will also let the other person feel very unique, believe that when you give this gift to a lover, she will be moved because of your careful and considerate.Open ring design, the size of the ring can be adjusted, so that you do not have to worry about whether you can wear this ring. The minimum diameter is 17mm, which you can adjust according to your own needs.This is not just a jewelry, we need to take care of it careful, avoid collision, take a bath or exercise should not wear.Specification:Minimum Diameter: 17mm (Adjustable)Package Includes:1 Piece Mood Ring1 Piece Color Swatch1 Piece Paper Box(4 Pack)Note:The color of the ring varies with the temperature. It is black below 14c and can be changed into different colors between 14c and 38c.