The majority of bifold doors are 80 inches tall. The width varies depending on available space, but openings typically graduate in 24-inch increments up to 72 inches or more.What is bi fold?
bi·-fold. designed to fold in half, as at a hinge or crease: a bi-fold door, bi-fold wallet. any of various products designed to fold in half, as at a hinge or crease; esp., a hinged, often louvered door, as for a closet. a man's wallet.What is a folding door?
A folding door is a type of door which opens by folding back in sections or so-called panels. Folding doors are also known as ‘bi-fold doors', in spite of them most often having more than two panels.