lily ring,the model is designed for both CNC machine and printing, the model is divided into two parts. this can be seen in the attached picture (red and blue) file 3.1 the model is one-piece, can be printed. the size of the ring is 20.4mm, the weight is approximately 8 grams in silver (see the product volume in the screenshot), it can also be scaled up to 19mm, reducing the size will have to modify the model below.vintage images are attached in the picture, please note that this is only a program, a substation painter, the file is attached