Whew, is it dry in here or is it just these Cactus Dryer Balls? Just throw these cute cacti in your dryer and let ‘em do their thing. The Cactus Dryer Balls separate wet layers for a quicker, even dry, and fluffy fabric. Use them over and over! Cactus Dryer Balls come in sets of two and measure 4 x 3.5 x 2 inches.