USMC Master Sergeant Rank Green on Red sold in pairs is a service insignia that represents the rank of Master Sergeant. Master Sergeant is the 8th rank in the United States Marine Corp and ranked above Gunnery Sergeant. Master Sergeant role is to control and look over their assigned technical group. This green on red rank is regulation size measuring at 3 ¾ by 6 ¼ inches and is sold as pairs. This is an official issue and uniform ready for United States Marine Corps official uniform. This service insignia is made in the USA.