Carriage’s natural hemp hand sewing thread is an absolutely beautiful, high quality thread that is used by high end/luxury craftsmen. When hand making leather goods, every detail counts and thread is one of those choices that can make a difference between a great leather piece and a good one. Hemp thread is well known for its high strength (4 times stronger than linen), quality and beautiful rich colors. The #2015-00 Carriage Hand Sewing Wax was formulated to work with this high quality thread. 0.55 mm diameter.