USMC First Sergeant Green on Red represents the rank of a 1st Sergeant. First Sergeant is the 9th rank in the United States Marine Corps and is above Gunnery Sergeant and below Sergeant Major. First Sergeants are in control of medium to large units and are seen as a middle man between the Marines under him and his command officer. This green embroidered on red rank is regulation size measuring 3 ¾ by 6 ¼ inches and can be easily sewed onto your official United States Marine Corps uniform. This service insignia is sold in pairs and is made in the USA.