This model was created in ZBrush and prepared for 3D printing in Magics.

Sizes (inner diameter in mm): 15; 15.5; 16; 16.5; 17; 17.5; 18; 18.5.I can make any other size on demand.

Width - 6 mm. You can easily change it by scaling in any 3D program.

Weight in sterling silver (size 17) - 5,2 g, in 14k gold - 7,3 g.