Two-Two Train 2nd Birthday 18 inch round mylar (foil) balloon feature red color railroad caboose on one side and railroad crossing sign on the other side. Great decor for your little train lover's choo-choo train theme 2nd birthday party. The package contains one Mylar (foil) balloon. Measures approximately 18" in diameter. Ready to inflate with helium air. Please note that balloon is not inflated.