Size of the ring - 8.5 US (diameter 18.8 mm) Estimated weight WG14K - 6.56 gr; YG14K - 6.36 gr. There are 3 STL files - with and without stones, and without caverns. Files is checked for errors by Magics software. Model is ready for prototyping on CNC and 3D Printing. If you have any questions, please contact me.