1. 32 inches, about 75 cm in uninflated diameter (1 inch = 2.54cm). 2. Can be filled with helium/hydrogen floating. Air filled will not float! No extra knots are needed, and it will automatically seal after being filled. 3. It can be used repeatedly, easy to inflate and release. 4. Shape style: heart shape 5. Uses: used for wedding decoration, gift giving, birthday party celebration and holiday decoration, etc.
