Material: High quality copper. it is lead free and nickel free,hypoallergenic, it doesn't rust, change color or tarnish. Size: Minimum Diameter of Bracelet is 60mm(2.36 inch). Adjustable fits any women's wrist. Great gifts for that special nurse. This is Perfect gift for anyone who is Nurse or in Medical Field its life time Keeper and unique. Sent in the Zuo Bao jewelry velvet bag and ready for giving! If you have any quality problems, please feel free to contact us and we will give you a proper solution until you satisfied.