This collection of rings is ready for 3D printing.Ring sizes 17 17.5 18 18.5 19 19.5 20 20.5 21 21.5 22 mm. Approximate weight of rings by size(GOLD 14K): 17mm-7.11g 17.5mm-7.54g 18mm-7.97g 18.5mm-8.42g 19mm-8.89g 19.5mm-9.36g 20mm-9.85g 20.5mm-10.34 21mm-10.86 21.5mm-11.38g 22mm-11.92g. Width: 8mm.