And with such an awesome selection of women’s plus size Halloween costumes, you’re sure to find the perfect plus size costume right here at Spirit! So, maybe you’re still looking for the best plus size Halloween costumes . Womens Plus Size Costumes. Sexy cougars, gothic vampires, gypsies, witches and storybook characters are just a few of the sexy, bewitching or beguiling choices that we have in our array of women's plus size costumes. Have fun bringing out your curvaceous inner goddess, heroine or demon by wearing one of these truly amazing costume .