One-shoulder neckline (one edge, nearly linear) These are asymmetrical linear necklines that cut across the torso diagonally, usually from one shoulder to under the other arm. Polo neck (circular) These are high close-fitting collars that wrap around the neck itself, and are also called turtlenecks. They are most common for sweaters (also called jumpers) or jerseys. Portrait neckline A portrait neckline is a V-neck with the edges of the V placed out at the points of the shoulders rather than closer to the neck; it can be combined with a surplice neckline. Scoop neck (curved, concave up) These have a curved U-shape, with the arms of the U hanging on the shoulders. The depth of the U can vary, ranging from demure styles to plunging. Square neck (linear side edges neither converge nor diverge) These are characterized by three linear edges, the bottom edge meeting the side edges at right angles. The bottom edge cuts across the figure horizontally and the side edges pass over the shoulders. A special case of this is the slot neckline, in which the side edges are very close (roughly the width of the collar-bone points), forming a narrow slot. Surplice neckline These are similar to how a bathrobe's neckline is formed by one side of the garment overlapping the other. For a dress, the lower layer is usually sewn to the top layer just under the bust. Sweetheart neckline (side edges linear, curved bottom edge concave down) These have a curved bottom edge that is concave down and usually doubly scalloped to resemble the top half of a heart. The side edges often converge on the neck, similar to halter necklines. Sweetheart necklines accentuate the bosom. V-neck (2–4 linear edges, side edges diverge) Originating from the Middle East, these are formed by two diagonal lines from the shoulders that meet on the chest creating a V shape. The depth of the V can vary, ranging from demure styles to plunging. The V may also be truncated by a small bottom edge, forming a trapezoid. Modifications of necklines The shape of a necklines can be modified in many ways, e.g., by adding a collar or scarf, overlaying it with a gauzy material or decorating the edges with scallops, picots or ruffles. The neckline can be a sharp edge of fabric or a more gentle cowl, and can also be accentuated by pattern(s) in the fabric