40 Inch Jumbo Helium Foil Mylar Letters BOY Balloons Set (Premium Quality), Chrome Silver, 3 Balloons B O Y Size: 40" each letter Helium-inflation allow balloon to float. Easy to inflate using the a straw or an air handheld pump. Reusable. Self-sealing valve for easy inflation and deflation. Shipped uninflated. Can be air filled or helium filled Attention: Letter B and O balloon looks like a C before inflate.