These Bone Cancer Awareness Heart Keychains feature silver heart charms with the words "Bone Cancer Awareness," on a white ribbon. Give these key rings to your friends or attach them to your car keys, handbags, or purses to raise awareness of the disease. The charms measure around 5/8 inch by 5/8 inch and the key rings are roughly 1 1/2 inches in diameter. Each keychain is made of sterling silver and packaged in a bag.