These Parrty Balloons have confetti filled into them from before and their translucent material makes them visible from the outside. They are usually 12 inches in diameter that do not take out too much space and can be filled with helium air to suspend in the room. If using Helium air be sure to shake the balloons or rub on a static carpeted surface so that the confetti spreads evenly around the balloon. These are designed with a special individual mouthpiece that ensures the confetti won't be swallowed by the user. It stops the pieces from ejecting out of the balloon while you fill it up with air.