Very nice jumpsuit!  I'm 5' 9", 250, 42-38-56 and the 1X fits perfectly. There is enough support to wear without a bra if you are an A-C cup.
I do however suggest wearing something to cover the front of your breasts. My only complaint is that the rear sheer material was sewn onto the "crack" of the underlying shorts.  I fixed that with a seam ripper.