Clover Self Threading Needles come in an assortment of sizes and have a convenient built-in threader. Perfect for lightweight and heavier fabrics! Self Threading Needles by Clover, 5 pack sizes: For Shear/Light Weight Fabrics Short (0.64mm x 34.9mm) 1pc, Long (0.64mm x 42.5mm) 1pc, and For Coarse/Heavy Weight Fabrics: Short (0.71mm x 36.5mm) 1pc, Medium (0.76mm x 38mm) 1pc, Long (0.89mm x 42.5mm) 1pc.