Dorothy Wizard of Oz Costume Dress Child Wizard of Oz Costumes Child and Toddler Halloween Costumes This Dorothy Costume dress from the Wizard of Oz includes sparkly blue hair bow and blue/white sequin Dorothy dress. This Dorothy Costume dress is an officially licensed Wizard of Oz costume. The Dorothy Costume dress is available in child sizes Toddler & Small. Dorothy’s Ruby slippers sold separately. PLEASE NOTE: If your child ordinarily wears size 4, the Toddler size may be too small. The Toddler size best fits children who ordinarily wear size 2-3.