This 3 silicone cock ring set has triple the size options, with a premium material for longer lasting erection support. The smooth silicone is rigid yet flexible, with a matte finish and raised Tom of Findland logo on the outsid e. Comes in 3 graduated sizes, which you can wear alone or combine for maximum erection enhancement. Small ring diameter is 38.1mm. Medium ring is 44.45mm. Large is 57.15mm.