40 Inch Jumbo Helium Foil Mylar Balloons Bouquet (Premium Quality), Glossy Silver, Letters Baby 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 balloon looks like a C before inflate.