This collection of rings is ready for 3D printing.Ring sizes 16 16.5 17 17.5 18 18.5 19 19.5 20 20.5 21 mm. Approximate weight of rings by size(GOLD 14K): 16mm-10.94g 16.5mm-11.26g 17mm-11.57g 17.5mm-11.88g 18mm-12.19g 18.5mm- 12.5g 19mm-12.81g 19.5mm-13.12g 20mm-13.43g 20.5mm-13.74g 21mm-14.05g. Width: 9mm Round stones: 134 (1.0mm).