In accordance with the teachings of the present invention, adjustable ring structure is provided wherein a ring shank is hinged to define {HEAD ~ first and second arcuate elements} having {TAIL ~ an aperture therebetween} 
having
In accordance with the teachings of the present invention , adjustable ring structure is provided wherein a ring shank is hinged to define { HEAD ~ first and second arcuate elements } having { TAIL ~ an aperture therebetween }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL