I am a clothing snob and I have two of these (black and gray) and I love them!  They are thick and fitted without being tight or uncomfortable.  They are also quite warm for shirts.  Perfect for the fall/winter.  I wear mine to work and on weekends as they go with lots of items in my closet!  The neckline is very flattering.  I plan on buying them in more colors because I have truly gotten more than my money's worth with these!  I sized up.  I am 5'6" and weigh 115 pounds and ordered them in a size medium.