Spartacus Leathers Cock Gear Leather Cock Rings. Plain Joe Black Leather Sewn Cock Ring is adjustable from 1.25 inches to 2 inches. These simple leather cock rings can adjust along three different snaps. Available with standard hardware in firm sewn black leather, soft black leather. Carefully rolled sewn garment leather gives these rings a silky texture. Cock rings when worn around the base of the penis and testicles, many users find that cock rings increase sexual pleasure. Plain Joe Cock Ring weighs .24 pound. Hand crafted leather goods from Spartacus Leathers A Passion For Quality Catalog page 28. New images added February 3, 2013.