This is my 3rd set of these tank tops, and I do plan on buying more colors.  Im 5'7" 130 lb slender build, usually wear a 4 and the medium fit me perfectly.  I have a long torso and these do cover my butt a little so they are perfect for me to layer with.  So if your not as tall as me, they may be long on you, but they were perfect for me. The instructions do say to hand wash and dry flat, but I don't do that.  I've had some for several months now, and have held up well washing on the delicate cycle and drying on low.