BLACK LEATHER NECKLACE Plain Medium Width. This simple, plain style, black genuine leather necklace has a medium width of just under 1/8 inch thick or 3 mm and closes with a silver lobster clasp. Comes in lengths of 16, 18, 20, 22, 25 and 29 inches long. RELATED ITEMS: Available in brown as Item #CL7BR. A thick width version is Item #CL6. A thin leather necklace is Item #CL8. Leather necklaces with decorative metalwork are Item #CL1 and Item #CL2.