
Perhaps you want to go for something a little more gothic, at the websites listed below you will find plus size Gothic Vampiress, plus size witches costumes, evil queens and frankenstein's brides.
If you are looking for fun character costumes then you can't go wrong with TV and Film characters such as I Love Lucy, Hairspray Tracy Turnblad or Edna Turnblad, Warrior Princesses even Batgirl, Supergirl and Wilma from the Flintstones are available as womens size plus costumes.
If you don't want to go the whole hog with a costume then you can always just wear a wig or cape, so that you look like you are entering into the spirit of Halloween, pun intended!