Army Staff Sergeant is given more duties than a sergeant and can be given responsibilities of control of platoon/section and other administrative duties. Must be complete experts of the role and technically proficient. Takes 84 months of service to obtain this high-class rank. Sew-on patch for the Class A Dress Greens. Is an official U.S. Army enlisted sleeve rank, uniform ready measuring 3” W x 4 1/2" H, and sold in pairs.