Simple in form, yet intended to be worn with purpose. These steel cock rings are as elegant as they are strict. There is no give here! Simply slip a Trine over the penis like a halo, encircling the scrotum for a supremely snug fit. Revel in the pleasure! The Trine Steel Rings can also be used to fit most harness systems. Measurements: Ring inner diameters: Small: 3.9 cm (1.53 inches), Medium: 4.6 cm (1.82 inches), Large: 5.2 cm (2.05 inches), All rings are 7 mm thick Material: Steel