Heavy Duty Natural Cowhide Vegetable Tanned Leather Strips 11-12-oz (4.5mm-5mm) Size up to 50" Total length Natural cowhide leather strips in several widths. Great for making belt straps, belts, guitar straps, gun slings, or any other kind of leather strap. 11-12oz. Avg 4.5mm to 5.0mm thickness. These strips are at least 50" end to end, with unfinished ends.