actually the shape is the one seen in the model (could be improved for the price) but disproportionately large compared to the stone and without the option of separate pieces in obj to be able to modify it. I have not been able to use it.
STONES: Diamond round 1 pcs 6,60 mm
FINGER SIZES: Ring size diameter 17,97 mm
File format: STL and OBJ (3dm file on demand )