pleat

Imagine a chef's hat—those neat, vertical folds you see are pleats. A pleat is a fold in fabric that is made on purpose and often pressed or sewn in place to add shape, fullness, or style. You'll often find them in skirts, trousers, and curtains. They aren't just for clothes, though; other materials can be pleated too, like paper folded into a fan or a map folded into sections. Think of it as a neat, controlled fold.

Pleats can be simple knife pleats (folds all going in one direction), box pleats (two folds opening away from each other), or more detailed designs. A well-made pair of pleated trousers looks sharp and also gives a little more room to move while keeping a neat shape.

A pleat is a fold that's been deliberately pressed or sewn into fabric. It is more than just a random bend; pleats are functional design elements created to add volume, texture, or a specific shape to clothing and other textiles. You see them everywhere: in the classic folds of a kilt, the structured elegance of a school uniform skirt, or the decorative drapery of curtains and lampshades.

There are several distinct types of pleats, each offering a unique aesthetic. Knife pleats are narrow, overlapping folds that all face the same direction, creating a sleek, streamlined effect. Box pleats consist of two knife pleats folded away from each other, resulting in a wider, more architectural look. For even more movement, designers use accordion pleats, which are tight, even folds that expand and contract like the bellows of an accordion, or crystal pleats, which are very fine, heat-set folds that give fabric a shimmering, textured appearance.

While "pleat" is most commonly associated with textiles, the concept applies to anything deeply folded or creased. You might see "pleated" filters in a car engine or "pleated" paper in craft projects. Historically, pleating was a laborious hand-done process—often involving heavy irons and starch—but today, specialized machines ensure these folds are precise and permanent. Whether they are serving a functional purpose or adding decorative flair, pleats provide dimension and visual interest to the objects and garments we use every day.