I'm 5'2 and 133 lbs.  I typically wear a medium, and the medium I got fits me well.  I purchased the black color, and it's perfect!  I adore the design.  I love the extra zipper layer underneath b/c it goes all the way to my chin, thus, eliminating the need for a scarf!  It's a good quality coat, and it ends right below the knees on me - the sleeve length covers half of my hand so it's just a tad longer on me (if there was a petite medium, this coat would have been perfect!).  There's enough room that I can wear a hoodie under the coat and still be comfortable.  There's a cute little zippered pocket on the left side of the arm, which I like as well.