This collection of rings is ready for 3D printing.Ring sizes(Korean Standart) 7 8 9 10 11 12 13 14 15 16 17 18 19 20 . Approximate weight of rings by size(GOLD 14K): 7-2.64g 8-2.67g 9-2.73g 10-2.76g 11-2.82g 12-2.88g 13-2.91g 14-2.97g 15-3.04g 16-3.06g 17-3.13g 18-3.15g 19-3.21g 20-3.28g. Width - 3.2 mm. Thickness - 1.5mm. I can make to order with your parameters.