Bivens was then 5 foot 3 inches tall, with brown hair and hazel eyes. Musicologist Alec Palao has described her as "a petite powerhouse with demurely attractive looks a penchant for European style". Surviving television clips capture her rather chic, mod style of dress, with bobbed hair and go-go boots. She was sometimes mistaken for the actress Barbara Feldon, co-star of the television series "Get Smart", who also had a bob. Bivens' relatively brief career covered a period in which she was one of a fairly small number of female rock musicians: her classic style, at least until 1966, was in contrast to the more Bohemian look favored by contemporaries like Grace Slick or Janis Joplin.