I am normal size 2x I size up to 3x for looseness.2x was loose enough and fitting to your shape .i am 326 pounds,40dd for reference.the material is definitely warm enough wear in 42 degrees weather.i live in Virginia it still cold here I brought it in January definitely a closet new favorite.thank you fashion nova.this definitely a happy order and it was his favorite color green.o by the way color and length is just like photos .