Air Force Chief Master Sergeant Rank is a unique Non-Commissioned Officer rank in the United States Air Force. Promotion to this rank indicates that a service member has exemplified characteristics worthy of the highest enlisted level of leadership in the US Air Force. The pin design is similar to that of a Senior Master Sergeant, displaying three downward pointing silver chevrons outlined in blue, an encircled star in the center, and two curved chevron below the encircled star. However, this rank pin also displays three upward pointing chevrons above star. This rank pin is sold as a pair with a pin clutch backing and is 100% made in the USA. The pin measures 1 1/8 inches.