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. Reveal in the pleasure! The Trine Steel Rings can also be used to fit most harness systems. Measurements: Ring inner diameters: Small 1.53 inches, Medium 1.82 inches, Large 2.05 inches. All rings are 0.3 inches thick.