Over the last several years I have ordered cashmere sweaters from a number of venders on Amazon.  My best experience has been with the Sofie brand.  The colors are lovely and sizes accurate.  I have not personally experienced any itching from the sweaters. (Decent cashmere should never itch and use of a moistureing hand lotion 10 minutes before getting dressed can eliminate the issue.)  I find the sweaters are not thin such as I have experienced with other more higher priced brands.  I am a 10 and always order a large or extra large as I always wash my sweaters.  The larger size can allow for slight shrinkage.......which can also occur with dry cleaning.  I have purchased many of the colors which have remanied bright a vibrant in spite of washings.