That is where body shape plays a huge part as well.
buttons-are you an "apple" shape and store your extra weight in the upper body and stomach area?
I am an "hourglass" shape and I wear a size 14 at 164 pounds. Going by your comments, you wear a smaller pants size than I, but I would guess a larger top/blouse size than I, correct?
I carry my weight in my hips and thighs, but also in my breasts and upper arms. I have a narrow torso though with well defined shoulders and waist.