An oak leaf cluster is a ribbon device to denote preceding decorations and awards consisting of a miniature bronze or silver twig of four oak leaves with three acorns on the stem. It is authorized by the United States Armed Forces for a specific set of decorations and awards of the Department of Defense, Department of the Army, and Department of the Air Force. The bronze oak leaf cluster represents one additional award, while the silver oak leaf cluster is worn in lieu of five bronze oak leaf clusters. Criteria and wear Oak leaf clusters are worn with the stems of the leaves pointing to the wearer’s right. For medals, oak leaf clusters are worn on the medal's suspension ribbon. For service ribbons, oak leaf clusters are worn, with no more than four oak leaf clusters being worn side by side. If the number of authorized oak leaf clusters exceeds four, a second ribbon is authorized for wear and is worn after the first ribbon. The second ribbon counts as one additional award, after which more leaf clusters may be added to the second ribbon. If future awards reduce the number of oak leaf clusters worn on the first ribbon due to bronze oak leaf clusters being replaced by a silver oak leaf cluster, the second ribbon is removed and the appropriate number of devices is placed on the first ribbon. Examples The following are examples of the first through twenty-first awards of an Army Commendation Medal with the bronze and silver oak leaf clusters: Decorations and awards Oak leaf clusters may be worn on Department of Defense, Department of the Army, and Department of the Air Force decorations and awards presented to members of the eight uniformed services: the Army, Navy, Marine Corps, Air Force, Coast Guard, Space Force, Public Health Service, and the NOAA Commissioned Corps. Except for the Air Medal, unique decorations and awards issued by Department of the Army or Department of the Air Force, and those decorations and awards issued by the Department of Defense, the other uniformed services use inch stars to indicate subsequent personal decorations only; a gold inch star is equivalent to a bronze oak leaf cluster, while a silver inch star is equivalent to a silver oak leaf cluster. While the Air Force uses oak leaf clusters for the Air Medal, since the Vietnam War, the Army has used bronze Arabic