I have this problem when I tuck shirts and blouses into higher waisted skirts: the shirt always puffs around the waistline, resulting in me looking far wider than I really am. This can be avoided if I wear skin tight layering shirts, but I don’t always want to do that. So I usually take a button up and tie the ends around my waist. Problem solved.
Shirt – Old Navy / Skirt – Mendocino / Shoes – J.Crew / Clutch – Kate Spade / Earrings – Banana Republic