Chairs are versatile pieces of furniture designed for sitting. They typically have a seat, backrest, and four legs, though some may have armrests or additional features. Chairs come in a wide variety of styles, from simple, functional designs to highly decorative or ergonomic models. The seat can be padded or firm, and the backrest may offer varying levels of support, from a low curve to a high, cushioned back. Materials vary greatly, including wood, metal, plastic, or upholstered fabrics, and they can be used in many settings such as dining rooms, offices, or outdoor spaces. Some chairs are designed to be stackable or foldable for easy storage, while others might be reclining or swivel to increase comfort and functionality.