Good posture can take off 10 pounds and dramatically improve how your dress looks on you.
Try this: stand with your back against the wall. Line up your head, shoulders, rear and heels against the wall. Now step away from the wall keeping everything aligned. That is your body with good posture.
I have stooped shoulders in my graduation picture. Every time I see it I wonder why the photographer didn’t tell me to sit up straight. Remember good posture all day long.