If you can only visit one yarn shop in Paris, this should be it. It is located in one of the grand passages - an ancient precursor to the present day shopping mall. The "Passage du Grand Cerf" is one of the prettiest, with domed class ceiling 3 floors high and decorated with wrought iron and wood. Lil Weasel is one of the shops lining this passage. Then you step inside this petite boutique to see a nice selection of yarn arranged by colour and a cozy sitting area for knitting. The owner is very friendly and speaks English fluently. The store has only been open 4 months, but there are many nice samples.