1 ½ Sacred Cubit Ring Plain Copper 3 Beads; ~ 10 inches in diameter.
It seems to be useful for healing sessions, household uses that need a larger area of concentration like a bowl of fruit, placed on a chair, around a larger water container, over the neck or other body parts in need,  around larger faucets, for healing sessions. The main thing to remember is that the area of the tensor is expanded when the diameter of the ring is larger.