Marine Corps Service AiguillettesUSMC Aiguillette Synthetic Gold & Red Criteria: Marine Corps Service Aiguillettes consist of round gold wire and scarlet cord, 1 4 inch in diameter, and consist of two, three, or four loops sewn together all the way around. Service aiguillettes are fastened under the shoulder strap and go around the shoulder just under the armpit, with the longest loop nearest the collar. Service aiguillettes are generally reserved for the following: Four Loops Aides