1.75 inch, 2 inch, and 235 inch rings that men can place at the base of the shaft to help maintain an erection. Bulk Weight: 3.5(oz) / 0.1(kg.) Metal adornment rings. Steel with gold plating. 1.75"/4 cm (diameter.) 2"/5 cm (diameter.) 2.5'/6 cm (diameter.) NOTE: Inside diameter of these rings is 1.25", 1.5" and 2."