Sewing thread for leather, upholstery, footwear and heavy fabrics, in two types:
• Bonded nylon thread for machine and hand sewing. Sizes run from finer to heavier: B33 (T30), B46 (T45), B69 (T70), B138 (T135) and B207 (T210). Bonding keeps the thread smooth and helps stop it fraying as it runs through the needle.
• Waxed thread for hand stitching, in 0.8 mm and 1 mm heavy-duty spools.
In general, lighter sizes such as B33 and B46 suit garments, bags and small leather goods, B69 is a common all-round size for bags and upholstery, and B138 and B207 are for heavy work such as saddlery, belts and thick leather. Match the needle size to the thread. Each listing shows its own spool size and colors.
Find more supplies in Sewing Notions & Supplies.