Those dimentions are the body, not including the legs.Argiope aurantia is commonly known as the Black and Yellow Garden Spider, Writing Spider, Banana Spider or Corn Spider. It is common to the lower 48 of the United States, Hawaii, southern Canada, Mexico, and Central America. They have distinctive yellow and black markings on their abdomens and a mostly white cephalothorax. Males range from 5 to 9 mm (0.2-0.35"); females from 19 to 28 mm (0.75-1.1"). Like other members of Argiope they are considered harmless to humans.