Zeekio's Cirrus Juggling Balls feature a Lycra-based outer shell, and are filled with seed for just the right amount of "pop." Cirrus balls have four panels, and are uniformly round and moderately firm. The outer shell is durable and has a bit of give to it. The 125-gram Cirrus balls are about 2.5 inches in diameter. Cirrus balls are also available in a slightly larger and heavier 140-gram size. Balls are sold individually. Price is per ball.