I am 160 pounds, 36C chest, and 5'8" tall.  I ordered US size 12-16 and fits great.  The sweater is comfortable, extremely warm, stretches nicely, covers my bottom, and looks great with leggings and skinny jeans with a pair of tall boots or ankle boots.  I have become a fan of these sweaters that I ordered the colors black, gray (unfortunately, the gray was a bit scratchy), wine, and cream.  The sweaters were definitely a great buy and would definitely recommend.