One size fits most adults. Perfect for Halloween or Carnival season. Easy and simple one piece slip on. Fan inflates costume in seconds & lasts up to 7 hours. Requires 4 x AA batteries (not included). Don\'t feel sluggish going to your next party by s-nailing your costume in our inflatable Snail! This costume is completely original and there won\'t be anything like it at the party to compete! It\'s perfect to get a laugh out of your friends at Halloween, Carnival season, or any animal themed event!