A cue stick (or simply cue, more specifically pool cue, snooker cue, or billiards cue), is an item of sporting equipment essential to the games of pool, snooker and carom billiards. It is used to strike a ball, usually the cue ball. Cues are tapered sticks, typically about 57–59 inches (about 1.5 m) long and usually between 16 and 21 ounces (450–600 g), with professionals gravitating toward a 19-ounce (540 g) average. Cues for carom tend toward the shorter range, though cue length is primarily a factor of player height and arm length. Most cues are made of wood, but occasionally the wood is covered or bonded with other materials including graphite, carbon fiber or fiberglass. An obsolete term for a cue, used from the 16th to early 19th centuries, is billiard stick.
The forerunner of the cue was the mace, an implement similar to a light-weight golf club, with a foot that was generally used to shove rather than strike the cue ball. When the ball was frozen against a rail cushion, use of the mace was difficult (the foot would not fit under the edge of the cushion to strike the ball squarely), and by 1670 experienced players often used the tail or butt end of the mace instead. The term "cue" comes from queue, the French word for "tail", in reference to this practice, a style of shooting that eventually led to the development of separate, footless cue sticks by about 1800, used initially as adjuncts to the mace, which remained in use until well into the 19th century. In public billiard rooms only skilled players were allowed to use the cue, because the fragile cloth could be torn by novices. The introduction of the cue, and the new game possibilities it engendered, led to the development of cushions with more rebound, initially stuffed with linen or cotton flocking, but eventually replaced by rubber.