Prevue Pet Simple Wood Dowel Swing For Birds. The Small Is 3X4 Inches And The Large Is 4X5 Inches. This Swing Fits In Most Cages And Is Durable. Birdie Basics Brand Search_Phrases: Bird Cages,Bird Stands,Bird Carriers,Pet,Bird,Pet Bird,Pet Products,Prevue Pet Products,Prevue Pet Bird Cages & Swing 3 X 4