Which designer created the 1957 sack dress, a loose silhouette that challenged the fitted fashions of its time?

Cristóbal Balenciaga created the 1957 sack dress, a loose silhouette that challenged the fitted fashions of its time.

The sack dress replaced the sharply defined waist with a relaxed, almost cylindrical shape. Balenciaga’s version looked simple from a distance, but its success depended on precise cutting, proportion, and control of the fabric.

The design appeared during a period when Christian Dior’s New Look had made narrow waists and full skirts highly influential. Balenciaga’s looser approach initially seemed radical because it concealed rather than emphasized the body’s waistline.

The sack dress is sometimes confused with the later shift dress, which also used a relatively straight silhouette. Balenciaga’s 1957 design was especially important because it helped lead fashion toward the architectural, less waist-focused shapes of the 1960s.