Other variants include the divan, the fainting couch (backless or partial-backed) and the canapé (an ornamental three-seater). To conserve space, some sofas double as beds in the form of sofa beds, daybeds, or futons.
A furniture set consisting of a sofa with two matching chairs is known as a "chesterfield suite" or "living-room suite". Also in the UK, the word chesterfield meant any couch in the 1900s, but now describes a deep buttoned sofa, usually made from leather, with arms and back of the same height. The first leather chesterfield sofa, with its distinctive deep buttoned, quilted leather upholstery and lower seat base, was commissioned by Philip Stanhope, 4th Earl of Chesterfield (1694–1773). In Canadian English, chesterfield as equivalent to a couch or sofa is widespread among older Canadians, but the term is quickly vanishing according to one survey done in the Golden Horseshoe region of Ontario in 1992.