Love the fabric; it's dense, not thin and cheap); color is beautiful (Waterfall). Unfortunately the Medium is a bit too snug, to be comfortable....I am 5'4", about 144 lbs, 38C, 32" waist and 38 hips.

I have the same Yoga style top by Danskin "Now" in a Medium (8-10) and it fits perfect.
I think the difference is the fabric; Prana's Supplex/Lycra...the thickness of the fabric provides less "give", versus Danskin's looser/stretchier Polyester/Spandex.

Just re-ordered in a Large and included the White.