Quantity: 1 Standard XL Accent your baseball themed party with this 18 round Championship Baseball foil mylar balloon. The perfect balloon for your baseball party this 18 Anagram party balloon is great for setting the scene! This balloon includes a self-sealing valve preventing the gas from escaping after it s inflated. The balloon can be inflated with helium to float or with a balloon air inflator. Balloon arrives uninflated. Championship Baseball Foil Mylar Balloon | 18 | Anagram