US Patent 7845191 Adjustable sized jewelry

A size adjustable item of jewelry has a plurality of movable inserts placed within a channel or a groove formed into the inner circumferential surface of body frame of generally a ring shape. The movable inserts are biased towards the radial center of the body frame by an elastic member, and thus can move in a radial direction with respect to the body frame such that inner surfaces facing the radial center of the movable inserts together define another generally ring shape of varying radius, and thereby allows the size of the ring shaped jewelry to be adjusted within a range of sizes.