A balloon column is a freestanding, pillar-like structure of balloons, often used as decoration for parties and events. They are typically 6 to 8 feet tall but can be customized in height and design, using different styles like classic stacked, spiral, or organic looks, and can be personalized with logos, numbers, or other decorative toppers. These columns are designed to be sturdy, often with a heavy base for stability, and can be made of latex or foil balloons.