Types of necklines and how they frame you

Round necklines: crew, jewel and scoop

The crew neck is the circular neckline of a T shirt or sweatshirt, sitting at the base of the throat and finished with a ribbed knit band. The jewel neckline has the same height and shape but no band, just a clean finished edge, which is why it appears on dresses, shells and blouses rather than on casual knits. The name comes from the way it follows the line where a short necklace would sit. A jewel neckline is one of the most useful shapes for work because it covers the chest completely and gives a smooth backdrop for a pendant or a strand of pearls worn just below it.

A scoop neck is a deeper, wider U shape whose sides rest on the shoulders or collarbones. It shows more skin than a jewel neck without the directness of a V, and it is the easiest neckline for layering: a scoop neck knit over a collared shirt or under an open cardigan both look intentional. A keyhole neckline adds a small opening, round or teardrop shaped, at the center front of an otherwise high neckline, usually fastened with a button or tie at the top.

V necklines: V, plunge, wrap, sweetheart and Queen Anne

A V neck is formed by two straight lines from the shoulders meeting at a point on the chest. Its depth ranges from a shallow V on a sweater to a plunge that reaches the breastbone or lower. The V draws the eye vertically, which is why it pairs well with a pendant on a chain that echoes its shape. A wrap or surplice neckline creates the V from two overlapping panels, as on a wrap dress; it moves with the body and adjusts a little to your shape, but it can gape when you lean forward, so check it in a mirror before you buy.

The sweetheart neckline is curved at the bottom in two scallops that meet in a dip at the center, like the top of a heart. It is the classic shape for strapless ball gowns and wedding dresses, and gentler versions appear on everyday dresses with straps. A Queen Anne neckline combines an open front, usually a V or sweetheart, with a high standing collar that rises around the back and sides of the neck. The effect is regal and framing, a little like a portrait collar, and it is a common choice for formal and bridal wear because it offers shoulder coverage while still opening the neckline at the front. Definitions of the Queen Anne vary between designers, so look at photos rather than trusting the name alone.

Wide and straight necklines: square, boat and off the shoulder

A square neckline has two straight vertical sides and a horizontal bottom edge, forming three sides of a square. It has a vintage, slightly romantic feel and looks best with short necklaces or none, since a long chain would cut across its lines. The straight across neckline is the strapless version: a horizontal edge at the top of the bodice, relying on internal structure to stay up.

The boat or bateau neckline is high and wide, running almost horizontally from shoulder to shoulder just above the collarbones. It is elegant and minimal and needs very little jewelry; earrings usually do more than a necklace here. A Sabrina neckline is wider still, sitting between a boat neck and an off the shoulder line. The off the shoulder neckline itself sits below the shoulders and across the upper arms, often with elastic or a structured band, and a portrait neckline is a softer, wider version that frames the shoulders with a folded collar. Because these necklines leave bra straps nowhere to hide, plan for a strapless bra or one with convertible straps; our guide to measuring bra size matters here, since strapless bras depend on the band fitting firmly.

High necklines: mock neck, turtleneck and cowl

A turtleneck folds over and covers most of the neck; a mock neck stands about halfway up without folding; a funnel neck widens slightly as it rises. These are the main types of necklines for sweaters in cold weather, alongside the crew and V neck, and they layer neatly under blazers and coats. A fine knit turtleneck under a jacket can stand in for a shirt and tie in many settings.

A cowl neck is cut on the bias so the fabric falls in soft drapes around the neck or across the chest. It looks fluid in silk, satin and fine jersey, and heavy and cozy in a chunky knit. Because the cowl is already doing the decorating, it usually looks best without a necklace. For shirts, the neckline is often defined by a collar rather than a cut; our guide to shirt collars covers point, spread, mandarin and other collar styles.

Halter, apron and one shoulder necklines

A halter neckline has straps or fabric running from the front of the bodice around the back of the neck, leaving the shoulders and usually the upper back bare. A halter dress can have a V or scoop front, or a high front that covers the chest. It is a summer and evening favorite because it shows the shoulders while keeping the front secure. The bra question is the main practical one: a strapless or halter style bra is the usual answer, or a dress with built in support.

An apron neckline is a close cousin. The front is a high, straight panel, like the bib of an apron, and the armholes cut in sharply toward the neck so the shoulders are exposed. The fabric fastens at the back of the neck. An apron neckline looks clean and modern and suits minimal jewelry. One shoulder and asymmetric necklines run diagonally, leaving one shoulder bare, and they look strongest with nothing at the neck and a single statement earring. An illusion neckline, common on wedding dresses, places sheer fabric or lace over a lower neckline to create a second, higher line.

How to choose and wear a neckline

Start with the occasion and the dress code. A jewel, boat or modest V neck works almost anywhere, including offices and religious ceremonies; plunging, strapless and off the shoulder shapes belong to evenings, parties and warm weather. For a wedding, where modesty expectations vary by culture and faith, our guide to what to wear to a wedding helps you read the invitation.

Then think about what sits next to the neckline. Necklaces look best when their shape echoes the neckline or sits clear of it: a pendant in a V, a short chain above a scoop, nothing or earrings only with a boat neck, halter or cowl. Our guide to layering necklaces covers lengths in detail. A scarf changes a neckline completely, filling a deep V or softening a square; see how to tie a scarf for ways to do it.

Much of the advice online sorts necklines by body type, and some of it is useful as a description of effects: wide necklines draw the eye outward across the shoulders, deep V and scoop shapes draw it downward, and high necklines keep attention near the face. None of that is a rule. If you like how a neckline looks and feels when you move, sit and lean forward, it is the right one for you.