What is a trapezoid silhouette?
Trapezoid silhouette - is a type of clothing cut that has a narrow upper part in the shoulder or waist area and gradually widens towards the bottom, resembling a geometric figure or the letter "A".

This concept was first introduced by Christian Dior in 1955 with his A-line collection. In 1958, Yves Saint Laurent refined the cut and released his debut spring collection, Ligne Trapèze, which brought the silhouette worldwide popularity.
The key feature of this cut is the complete absence of emphasis on the waist when creating dresses and outerwear. For skirts, the silhouette features a snug fit at the waist with a pronounced, shape-stabilizing flare toward the hem.
Distinctive features and types
The A-line silhouette is based on architectural design and geometry. The garment maintains its shape and does not cling to the body below the flare line, creating a clear, graphic outline.

To create the perfect trapezoid shape, shape-stabilizing fabrics are used. Designers most often choose heavy cotton, tweed, gabardine, genuine leather, neoprene, and thick wool. Soft and flowing materials are unable to convey the desired geometric shape.
In modern fashion, the A-line silhouette comes in several basic variations. The most recognizable is the mini A-line dress, a nod to the aesthetics of the 1960s. A-line skirts of various lengths, from mini to midi, are also common.
Among outerwear, flared coats and cropped raincoats stand out. Loose blouses and A-line tops are common in everyday wardrobes.
What to combine with
When styling A-line garments, a basic rule of proportion applies: a voluminous garment requires balance with fitted or straight-cut pieces. This avoids visually weighing down the figure.

A-line skirts pair harmoniously with fitted tops. Turtlenecks, fitted knits, or classic shirts tucked in are perfect for this look. A-line coats and tops pair well with slim bottoms: straight jeans, cigarette pants, or pencil skirts.

A-line dresses act as a standalone statement piece. They pair well with flat shoes, such as loafers or Mary Janes. In cooler weather, A-line mini dresses are paired with thigh-high boots. Rigid geometric bags complement the architectural cut to complete the look.