Print Ready 3D Model Engajament Ring 1cts set 001.25Size Ring size USA 6.2 / BRL 15 / 16.8 mm Diamond variations: Center Diamond Round - 0.25 ct / 4.0 x 4.0 mm Diamond Round - 0.008 ct / 1.15 x 1.15 mm Diamond Round - 0.0125 ct / 1.35 x 1.35 mmWeight 18 ct gold - 4.0 grams.Model available in STL format for prototyping.Model is ready for prototyping on CNC or 3D Printing.