X-Small: Recommended for small birds, such as parrotlets, lovebirds, canaries and similarly sized birds. (7" x 4" - Perch Diameter 3/4")
Small: Recommended for small birds, such as caiques, pionus, conures and similarly sized birds. (0.5" x 6.5" - Perch Diameter 1")
Large: Recommended for medium to larger birds, such as greys, eclectus, smaller cockatoos. (15" x 8" - Perch Diameter 1" - 1 1/4")
X-Large: Recommended for larger birds, such as macaws and cockatoos, but perfectly acceptable for medium birds. (20" x 10.5" - Perch Diameter 1 1/2"-2")
