United States Marine Corps (USMC) ties khaki 4-in-hand 3 and 1/8" x 61" (extra long). Marines will wear a khaki necktie with the service "A"/"B" and blue dress "C" uniforms. It will not be worn with the crew-neck service sweater. Neckties may be tied with any type of standard necktie knot which presents a neat military appearance.