This ring features a cushion-cut natural ruby weighing 2.45 carats. Surrounding the center stone is a halo of a prong set of pear-shaped diamonds which create a flowerhead design. The total weight of diamonds is 1.80 carats.the size of ruby is 8 x 7.40mm and the size of pear cut diamonds is 4.50 x 3 (12 pcs ).METAL WEIGHT : 14k : 4.820, 18k : 5.770, 22k : 6.700.FILE FORMATE : 3DM and STL.The files are checked for errors by Magics software and all the objects are passed and ready for 3D printing.This ring can be resized to any finger size at no cost.If you have any questions regarding the ARISS ENGAGEMENT Ring please don't hesitate to get in touch with me. Thank you.