A yarn is an aggregate of fibers compacted generally by a twisting operation into a cylindrical form of extensive continuous length. A twine is an aggregate of fibers or yarns compressed into a completely balanced twisted structure of continuous length. In plying, it may be twisted or laid. It is used essentially for tying or binding. A rope is a flexible, continuous, twisted yarn-strand structure of fibers, generally greater than 3/16 of an inch in diameter, structurally balanced to maintain a compact form.