Perch Size - One Size Doesn't Fit All Diameter RangeAppropriate for: 1/2" - 1"Parrotlet, Lovebird, Parakeet, Cockatiel 3/4" - 1 1/4"Conure, Caique, Meyers, Quaker, Pionus, Senegal, Timneh Grey 1" - 2"Eclectus, Congo African Grey, Small Cockatoo, Small Macaw, Amazon 2" - 3 1/2"Large Cockatoo, Large Macaw 2 more rows