The listing, HotDog Costume *Old Navy* One Size has ended.
my preemie baby couldnt fit into this at 6 mths old for halloween. so from my experience a good sizing would be prolly 12 pounds up to 25. its a big costume tho but those are my own estimates bc the costume just says 'one size' you probably could check Old Navy's sizing charts online and get a better idea. Never worn. brand new. smoke free environment. never washed. hund in closet away from all environments.