This collection of rings is ready for 3D printing.Ring sizes 15.5 16 16.5 17 17.5 18 18.5 19mm.Approximate weight of rings by size(GOLD 14K):15.5mm- 2.1g 16mm-2.17g 16.5mm-2.24g 17mm-2.3g 17.5mm-2.36g 18mm-2.42g 18.5mm-2.48g 19mm-2.54g. Width: 3mm. Thickness: 1 mm. Round stones: 6mm.