I ordered a 7xl but definitely could have gone down to a 6xl. I am 5'3'' and 240 pounds with a large bust(40H). The corset fit me and held the girls in well but there are no real cups persay  so that is a negative point for me. The bones are indeed plastic and therefore this is not meant for prolonged use or serious corsetting. Which is disappointing  to me but for 17.50 usd what more could I ask for.