This collection of rings is ready for 3D printing.Ring sizes 15.5 16 16.5 17 17.5 18 18.5 19 19.5 20 mm. Approximate weight of rings by size(GOLD 14K):15.5mm-4.15g 16mm-4.25g 16.5mm-4.35g 17mm-4.45g 17.5mm-4.55g 18mm-4.65g 18.5mm-4.75g 19mm-4.85g 19.5mm-4.95g 20mm-5.05g. Width: 3.5 mm. I can make to order with your sizes of stones. Please contact us.