PLEASE READ: *These balloons expand just like any normal Latex balloon. Keep filling the balloon until it is 10/18/24/36 inches in diameter. See the following sizes in circumference: 10inch: 31inches in circumference (79cm) 18inch: 56inches in circumference (143cm) 24inch: 75inches in circumference (191cm) 36inch: 113inches in circumference (287cm) *Do not stop until you have filled it at the stated length, but do not fill over the stated size otherwise the balloon will pop. *The un-inflated balloons will appear much smaller than stated (about 2 to 3 times smaller in size), but when inflated they will expand to size stated. *Fill until there are no creases along the seams. Please stretch the balloon (both sides evenly) to help the inflating process (as one side of the balloon could inflate more than the other). *Make sure you have the bubble balloon straight and level, and the nozzle or pump straight in the balloon, to avoid one side stretching faster than the other. The air/helium flow out of the nozzle/pump should not be pointing at one side of the balloon as this puts pressure onto that side of the balloon, meaning it could inflate faster than the other side. It needs to be pointing straight in to the balloon. *Advisory: To fill a 36" bubble balloon (properly) with helium it can be quite costly. *If unsure how to fill or have any other questions then please contact me before trying to inflate. *The 18, 24 and 36 inch balloons can be filled with helium *The 10 inch can not to be filled with helium, as it's too small to float *Use a balloon pump to inflate if inflating with air Item details: Colour: Clear Material: Plastic Size: 10inch (25cm), 18inch (45cm), 24inch (61cm), 36inch (91cm)