Really like the feel of the fabric, that it's a true turtleneck and the rib knitting.  I bought two Mediums and this white one was at least one size bigger and went down past my hips! So sizing is not consistent. I am sending it back and getting a small.  They have really good stretch and my concern is that over time a Medium would stretch out too much and that wouldn't look as nice in this style.  I usually wear at Large in tops and so, for me, this style runs quite large. I am 5'8" 140# and 36D. Hope this helps others when ordering.