The Circle of Shred is perfect for small and medium small birds. The Busy Basket is so popular, Things for Wings has added more of this size to keep the beaks busy.   The wood includes, balsa, yucca, and a couple of willow and ocotillo coins. The natural parts include vine, palm, bagels and shred.  Lots of beads and charms make this two sided toy irresistible.  All parts are secured with raffia and grass cord.  Hang from the top of the cage or secure to the sides.  Included are cable ties to secure to the cage bars.  The Circle of Shred measures 8" in diameter by 3" deep.