Im trying to knit a scarf for my boyfriend but I have no idea what type of yarn I have to buy.My physics teacher told me some types.but I still have no clue what it isA material that will keep him warm for the winterI have a 6in needle if that would change anythingand also, where is the cheapest place to buy yarn? I heard Michaels.but I don't know.
TO add to Bobby's answer In Rutherford's time, it was not possible get anything thinner than gold leaf Not sure how thick the gold was that he used but gold leaf can be made about 10 microns thick or about 10000 Angstroms or about about 2000 atoms.
You really need to take a basic beginner's knitting classYou need a PAIR of needles, and 6 inch is far too shortNeedles come in different sizes (thickness), and the size must be appropriate to the size of yarnYou can't just use any needle with any yarn!! This you would know if you know anything about knitting at all! Please take a classOf course, you should use wool for the scarfAny other animal fibre would be good too, and I especially like alpaca, with perhaps a little fine wool blended inMerino is a very good choice of woolEven a little silk or angora in the mix would be nice tooYou want it to be very soft against the skinA luxurious yarn is one made of quiviut - but is so-o-o-o expensive - it is without a doubt the warmest fibre you can find! These are all warmAny plant fibre (cotton, linen, ramie) is not that warm in winterFind good yarns at your LYS; Michael's or Joann's don't have good yarnsThese yarns are going to cost a bit more than cheaper acrylics, but look and feel so much nicerA synthetic like acrylic cannot keep you warm - they are plastic, and do not trap in heatAcrylics do not look good for longTo knit a scarf will take a long timeIt also takes a lot of practice to be good enough to knit something that you want to present to anyone elseDon't plan on finishing it this yearbut get started now to have it done by next ChristmasPlease TAKE A CLASS!