"These run true to size. Nevertheless, there are so many perverse ideas about size out there, that I thought I would indicate what fit me.
I'm 5'4", 106lbs with a dance/yoga build. The size XS was extremely tight and unattractive on me; the size small fits perfectly.
The spandex shows every bump and curve, so if you are not in great shape, get a size up and put on some spanx.
Hope this helps."