In clothing, a suit is a set of garments made from the same cloth, usually consisting of at least a jacket and trousers. Lounge suits, which originated in Britain as country wear, are the most common style of Western suit. Other types of suit still worn today are the dinner suit, part of black tie, which arose as a lounging alternative to dress coats in much the same way as the day lounge suit came to replace frock coats and morning coats; and, rarely worn today, the morning suit.
The variations in design, cut, and cloth, such as two- and three-piece, or single- and double-breasted, determine the social and work suitability of the garment. Often, suits are worn, as is traditional, with a collared shirt and necktie. Until around the 1960s, as with all men's clothes, a hat would have been also worn when the wearer was outdoors. Suits also come with different numbers of pieces: a two-piece suit has a jacket and the trousers; a three-piece adds a waistcoat; further pieces might include a flat cap made from the same cloth.
Originally, as with most clothes, a tailor made the suit from his client's selected cloth; these are now often known as bespoke suits.