Get the Perfect Fit
Ideally, the cut of this classic style is "narrow enough to be elegantly slimming, but not so tight that it is formfitting," says designer Sigrid Olsen, who is based in Hamilton, Massachusetts.
- Neckline: Lying at or just below the collarbone, it should never gape, even when you lean forward
- Chest: The dress should not pull or sag at the bustline.
- Armholes: "Look for a cut that's generous enough to allow a full range of motion but doesn't reveal your bra," recommends Olsen.
- Hips: The fabric should fit close to the body, especially when the hips are wider. If the fabric hangs too loosely, "it can cause draping, and you'll look like you have a bag on," says Dawn Del Russo, a stylist based in Verona, New Jersey.
- Hem: "A sheath dress looks chicest when it hits just at or slightly above the knee," says Aguiar. A dress that's any longer will make the legs appear more stout than sleek.