The Pickapart is a multifunctional twig ball stuffed with sea grass, abaca and coconut fibers. Your bird can roll it, carry it around the house, or work on extracting the enticing bits that hide within. You can add bits and pieces of anything that your bird enjoys, making it even more fun to discover what's peeking out at them. The StarBird Pickapart is fun for body and mind. Small measures approx. 3.5" diameter, medium about 4" diameter and large is approx. 5" diameter.