A neckline is the top edge of a garment that surrounds the neck area. It plays a significant role in the overall design and style of clothing, influencing how a piece looks and feels. Different types of necklines, such as crew neck, V-neck, and off-the-shoulder, can create various effects, from casual to formal. The choice of neckline can also affect how flattering a garment is on different body types. For instance, a sweetheart neckline can enhance the bust, while a high neckline can elongate the appearance of the neck. Understanding necklines helps in selecting outfits that suit personal style and body shape.