Malabrigo's beautiful Sock yarn is a plied, light fingering weight. Details: 100% Superwash Merino Wool 440 Yards/402 Meters 100 grams/3.53 oz Needle Size - 2.25-3.25mm/1-3US Hook Size - US B-1 to E-4 - 2.25 - 3.5 mm Machine washable, gentle cycle, cold water, do not tumble Light fingering weight