This is a feather ring. The stl format is tested fully and suitable for printing production and has been tested before stl,the obj, 3dm, and fbx files are available The size of the ring and also weight is described on the picture slide. If you want more design please visit my page. It is a printable model it is castable approximately in all metals. If you want to design your personal model please hire or contact us. I will provide you with the best service. I wish you a good day. Thanks