This collection of rings are ready for 3D printing.Ring sizes 15.5 16 16.5 17 17.5 18 18.5 19 19.5 mm. Approximate weight of rings by size(GOLD 14K):15.5mm-2g 16mm-2.02g 16.5mm-2.11g 17mm-2.14g 17.5mm-2.22g 18mm-2.24g 18.5mm-2.33g 19mm-2.35g 19.5mm-2.43g . Central stone:Round 4mm.I can make to order with your sizes of stones. Please contact us.