Gothic Halloween Costumes Plus Size Sultry Sea Witch Costume Plus Size Witch Costumes Simple or Elaborate, Cute or Sexy Women Sultry Sea Witch Dress Black and Purple Costume Set Plus Size Witch Costume For Women. Those poor unfortunate souls! This plus size Sultry Sea Witch costume includes a velvet dress with shimmer tentacle skirt, purple ruffle trim, off the shoulder ruffle sleeves and a gold crown. (Gloves and stockings not included.)