1, if your down jacket is slim. Wear a black slim sweater, slim jeans and booties (it looks tall). 2. The second way is to wear down jacket to cultivate one's morality, and wear bottoming, woolen shorts or short skirts and high-heeled boots. Both of them are tall and thin. 3. If the down jacket is casual or heavy, wear a long sweater, a bottoming coat and a pair of high-heeled boots.