Abstract: An adjustable finger ring, comprising a shank having spaced apart ends to define an adjustment gap. A spring extends from one end of the shank and is adapted to engage teeth or serrations of either a channel member or insert secured to the other end of the shank. A cap embraces the inner surface of the ring shank and embraces the adjustment gap and is secured to either the serrated tooth member or a separate channel member to maintain the components in place. The shank may be expanded to fit a variety of ring sizes.

Abstract: A ring sizer includes a handle assembly which rotates about a post with first roller and gear mounted on the post to cooperate with a second roller and gear on the handle assembly. A rotatable handle on the handle assembly moves the second roller and gear towards the first roller and gear. A pair of keeper pins on the handle assembly hold a ring on the first roller while the second roller exerts pressure on the ring shank to lengthen it. A groove in the second roller matches the cross-section of the ring shank to eliminate stretch marks and marring on the ring shank. The ring has a shank with a thick portion diametric to the jewel portion. The method of using a ring sizer calls for tightening the grooved roller adjacent the non-thick portions of the shank, so that no dents are caused in the shank. Beveled edges in the shank eliminate stretch marks and sharp edges during sizing.