Abstract: There is provided a ring sizing insert. The insert includes a pair of elongate members each of which is shaped to partially extend about the opening of a ring. A first of the elongate members includes a pair of spaced-apart, outwardly extending protrusions. A second of the elongate members includes a pair of spaced-apart recesses shaped to selectively receive respective ones of the protrusions. The elongate members when coupled together form a receptacle within which a portion of the band of the ring fits.