Spartacus Leathers Cock Gear Rubber Cock Rings. 1.25" Soft Rubber Cock Rings Blue. What fun! When worn around the base of the penis and testicles, many users find that cock rings increase sexual pleasure. Rubber cock rings in your choice of colors: blue, green, purple red and white. Each sold separately. Cock rings in a single size 1.25 inches. Weighs 0.24 pound.