About this item Foil Mylar Balloon, empty balloon is 42 inch, after filled with helium or air, it's 40 in 13 balloons, 13th Birthday Party Decorations, Rose Gold number 13 foil mylar balloon Official teenager 13 balloons, 40 in tall rose gold helium number balloon Happy Birthday Decorations, inflated with helium or air, use straw or air pump, straw included Number 13 Mylar Balloon is perfect for decorating a birthday party or 13 years anniversary, birthday party decorations Jumbo foil…