I am 5'5" and 170lbs size 16, 40FF and this coat XL fits me like it was custom tailored; roomy enough through the chest and nipped in at the waistline. Yes, it looks also amazing on the slim model! But bigger girls, you are in luck because this coat is very well made for the curvy sizes. I had ordered and returned many garments in search of style and a fit that I can actually button up, and this coat is beautifully made and generously sized. I had returned a different raw cut style that was too tight in the arms, but I am muscular, and this coat has ample shoulder and arm room. Very warm as well! Home run. Love it!