These great balls of vine will allow your feathered friend to have hours of playtime as he/she shreds these wonderful Natural Vine Munch Balls into little pieces. You can use them as a foot toy or string them together to make your own special bird toy for your feathered friend. Diameter of ball is 4". Set of 4 Large Natural Vine Munch Balls Large Munch Balls are ideal for Cockatoos and Macaws and all similar size birds.