Engagement Ring with Halo and 3 row ShankPrint Ready 3D Modelsizes:4.5 and 6.5(USA)Center Diamond 6.4 - 6.5mm (1ct) roundSide Diamonds: Halo 1.4mm - 16sts Shank 1.3mm - 48stsweight - 5.6g in 14k 6.7g in 18kModel Avalible in STL, OBJ and 3dm Model Ready for prototyping on CNC and Printing.