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- 4.31g 16mm-4.44g 16.5mm-4.56g 17mm-4.69g 17.5mm-4.82g 18mm-4.95g 18.5mm-5.08g 19mm-5.21g. Width: 4mm. Thickness: 1.6 mm. Round stones: 5mm.