Sabrina Undyed Sock Yarn in 47-inch / 120 cm hank is 80% Merino Extrafine SW Wool and 20% Nylon; this length of hank is standard for most yarns; 437 yards / 100 gram hank; 6.5 - 8 sts/inch; US 2 - 4 (3.00 - 3.50 mm) needles.