These are Made of high quality aluminum foil, about 16 inch in size, thick and auto-sealing, no leaks, can last for days when inflated. Give Your Big Party A Personalized Presentation With Foil Balloons! This Collection Of foil Balloons Features "ITS A BOY BLUE COLOR AND ITS A GIRL PINK COLOR" Alphabets, So You Can Mix And Match. Whether You'Re Celebrating A Shower Party, welcome party, These Shining Alphabets letter Blue & Pink foil Balloons Are Perfect For Your Celebration. Mix And Match With Coordinating Foil And Latex Balloons, Polka dot balloons & balloon accessoriesITS A BOY foil balloon X 1Self sealing mylar foil balloonFor all occasions including birthday party,shower party,welcome party, 6 month birthday partyColour: BLUEAvailable IT? A BOY Alphabet Letters With Star Shape Dots