Marine Corp Officer Collar Badge Black is the insignia for current officers. The globe of this collar insignia for the Marine Corps is approximately 9/16" in diameter, intersected by a fouled anchor, and surmounted by an eagle. Referred to as the "Eagle, globe and anchor". Comes in a pair for the right and left collar. It is Officially Hallmarked and approved by the U.S. Institute of Heraldry that is ready for official US Marine Corp uniform usage.