A square neckline is a type of garment neckline characterized by its straight, horizontal lines that create a square shape at the top. This design typically features a wide opening that exposes the collarbone and shoulders, offering a structured and elegant look. Square necklines can be found in various clothing items, including dresses, blouses, and tops. This neckline style is popular in both casual and formal wear, as it flatters many body types and can enhance the wearer's silhouette. Often associated with vintage fashion, the square neckline has been embraced in modern designs, making it a versatile choice for different occasions.