100% new and high quality.<br>Please check the ring size as below: <br> Diameter<br>#6 16.5mm=0.65"<br>#7 17.4mm=0.69"<br>#8 18.2mm=0.72"<br>#9 19mm=0.75"<br>#10 19.9mm=0.78"<br>#11 20.7mm=0.81"<br>#12 21.5mm=0.84"<br>#13 22.3mm=0.88“<br><br>Ring Material