These all stl files is tested fully and suitable for printing production and has been tested before stl, 3dm,The obj and fbx files are available in rar folder.The sizes of rings is US=9 and also weight is described on the picture slide . If you want more design so please visit my page. These all files are printable model it is castable approx in all metals. If you want to design your personal model so please hire or contact us. I will provide you with the best service. I wish you a good day. Thanks!