This collection of rings is ready for 3D printing.Ring sizes 15.5 16 16.5 17 17.5 18 18.5 19 mm. Approximate weight of rings by size(GOLD 14K): 15.5mm-8.49g 16mm-8.74g 16.5mm-8.98g 17mm-9.23g 17.5mm-9.48g 18mm-9.73g 18.5mm-9.97g 19mm-10.22g. Width - 8.1mm. Thickness - 1.7mm. Round stones - 1.2mm. I can make to order with your parameters.