What to know: Because this silhouette follows the curves of the body, a proper fit is crucial. Too loose and it’s sloppy; too tight and you’re the talk of the office. “Ideally you should have about a quarter to a half inch of ease on either side of the waist and hips,” says Chelsea Paskvan, a designer at Magaschoni. The bonus of the sharp two-tone sheath shown here: It lends a boyish or thick-waisted body an instant hourglass shape.
To buy: Blaise Kavanagh cotton-blend dress, $395, blaisekavanagh.com for stores. Gryson iPad case. Charles David heels. ESQ by Movado watch. Kara by Kara Ross bracelets.
Click through this gallery to find the right sheath dress for your shape, or browse more of our favorite work dresses: