Model is ready for 3D Printing and prototyping on CNC. Geometry is healed, and fixed all the bad with RP Magics software Ring sizes: inner diameter mm : 16,5 | 17 | 17.5 | 18 | 18.5 | 19 | 19.5 |20 Size USA: 6 | 6.5 | 7.25 | 7.75 | 8.5 | 9 | 9.5 | 10.25Gems size 9x7mm 1.7mmApproximate metal weight (for ring size 16.5 mm): gold 14k – 3.66 grams; gold 18k – 4.38 grams; silver 925 Sterling – 2.94 grams. Model volume (for ring size 18 mm): 284 cubic mm. You can check out my other products by clicking on the author name s.kim_jewelry_design. Any questions? Please contact me. instagram @s.kim_jewelry_design email skimjewelrydesign@gmail.com facebook s.kim_jewelry_design youtube SKIM Jewelry Design