[header] How to wear long coats [title] Try a fit-and-flare coat for the illusion of a thinner waist. [step] For a long coat that hides a thick waist, try a fit-and-flare style. These coats fit tighter around the waist and then flare out at the hips. 
The tops are often double-breasted, and there are strategically placed seams on them to create a thinner look. [substeps] Solid black and vertical stripes also make people look thinner.