INSPIRATIONAL WRAP RING Universal size. One size fits most. The rings are light weight and made of pliable metal allowing you to adjust inward for a smaller fit and expand outward for larger finger. Ring measures 1/4". You have the many options of wearing it on your: -Thumb -Index finger -Middle Finger -Pinkie Ring The rings are made of high quality aluminum, that is designed specifically for jewelry making. It’s hypo-allergenic, it won't rust or tarnish.