Our Alpaca Magic is just that - MAGIC! Use as a Worsted or Chunky weight yarn depending on your size needle. Use a US size 9(5.5 mm) for Chunky and 7(4.5 mm) for Worsted. We suggest always swatching to ensure correct needle size for your gauge. 4 stitches = 1 inch on US 9(5.5 mm). Like knitting with a teddy bear!