Wearing the 2T and it fits great! A little long but I don’t think I’d size up. Once he saw himself in the mirror he calmed down 🤣 now he wears this costume daily he just needed a minute Light up Halloween costume Light up buzz Lightyear Buzz Lightyear Halloween Buzz Lightyear costume Toddler buzz costume Amazon Halloween costume Toddler boy Halloween costume Toy Story costume Toy Story Halloween Toy Story Amazon LTKKids LTKFamily LTKHalloween