The advantage of knee-high boots is that they can be oh so sexy, and the downside is that they can quickly become too sexy, causing you to go from hip & fabulous to cheap & slutty. It requires some finesse. It works well as long as the rest of your outfit remains covered and controlled, preferably also a bit oversized. So grab a big sweater or a loose-fitting dress and let yourself be inspired by these four trendy types, then everything will turn out just fine.