Infinity heart charm pendant in sterling silver on an 18 inch sterling silver cable chain. This necklace is displayed on a card with the message " Happy 21st birthday ~ Always remember, you are braver than you believe, stronger than you seem, and smarter than you think and loved more than you know" The chain we used is a sturdy, strong sterling silver cable chain - it is 1.3 mm in width. ●Measurements: 22 mm x 22 mm ●Sterling silver cable chain ●Handcrafted in our studio in Brewerton, NY ●Perfect gift for a birthday girl ●Materials and Finish: Sterling silver ●Gift Box and Ribbon STERLING SILVER: We use .925 Sterling Silver that we source from reputable companies in the United States. Sterling silver oxidizes and requires polishing from time to time. You can easily restore the shine by using a polishing cloth. CARE INSTRUCTIONS: Sterling silver can react to beauty and cleaning products. Avoid contact as much as possible with perfumes, hairsprays, lotions and household cleaners. To maintain a shiny bright finish for as long a possible, store your fine jewelry away from the air in a ziplock plastic bag, and keep it as dry as possible. Do not wear in the shower or store in a humid environment.