Super Mario Bros. - Luigi Child Costume size Medium 8-10 The children's Luigi costume includes jumpsuit, Luigi hat and moustache. Our kids Mario Bros Luigi Halloween costume comes in child sizes Large, Toddler, Small, Medium. This kids Mario Bros Luigi Halloween costume is an officially licensed Mario Brothers costume. Family Halloween costumes ideas: This kids Luigi costume is great as part of a Super Mario family costumes group. Super Mario Brothers inflatable mallet is sold separately from this child's Luigi Halloween costume.