Extra Large Clear Balloons: These clear bobo balloons are 20 inches in size. Batteries Already Installed: LED string lights for the balloons come with batteries pre-installed and an on/off switch for control. The batteries are protected by a small tab that can be removed before use. The decorative lights on the balloons can shine for 24 hours at full brightness and an additional 48 hours at reduced brightness. Easier to Stretch Large: Clear bobo balloons are more difficult to stretch than regular balloons, allowing them to be stretched large and achieve a round shape without guaranteed bursting. Can Be Used with Helium or Air: Extra-large and stretchy bobo balloons are great for helium and air. Perfect table decorations for Thanksgiving and Christmas table settings. Long LED String Lights: For each balloon, the luminous strings are approximately 10 feet (300 cm) long in multiple colors. When using helium, the balloons can float about 6 feet from the floor with the LED string hanging down, anchored by the balloons. Pastel colors in green, pink, warm white, and blue can suit a variety of party themes, such as birthdays, Thanksgiving decorations, Christmas parties, and wedding party balloons and bridal showers. Package: 10 pcs balloons.