Since individual birds vary in size, even within species, the most important thing you can do to make sure you order the right size is to measure your bird using these instructions.
Use a soft fabric measuring tape. Measure all the way around the bird's neck, full circle. Then, measure down your bird's back, from nape of the neck to the top of the tail.
| Species | Size |
|---|---|
| African Grey (Congo) | 408XS |
| African Grey (Timneh) | 408XS |
| Amazon | 408XS |
| Amazon (Lilac Crowned) | 408XS |
| Amazon (Panama) | 408XS |
| Amazon (Yellow-Naped) | 408XS |
| Bourke Parakeet | 404X |
| Budgie (American) | 404X |
| Budgie (English) | 404X |
| Caique | 406XS |
| Cameron (African Grey) | 410XS |
| Cockatiel (larger with girth = 6.5") | 406XS |
| Cockatiel babies (Under 6 months) | 406XS |
| Cockatiel (Over 6 months) | 406XS |
| Cockatoo (Bare Eyed) | 408XS |
| Cockatoo (Citron) | 408XS |
| Cockatoo (Ducorps) | 408XS |
| Cockatoo (Eleonora) | 410XS |
| Cockatoo (Goffin) | 406XS |
| Cockatoo (Greater Sulphur Crested) | 410XS |
| Cockatoo (Lesser Sulphur Crested) | 408XS |
| Cockatoo (Medium Sulphur Crested) | 408XS |
| Cockatoo (Moluccan) | 410X - 412XS |
| Cockatoo (Rose Breasted - Galah) | 408XS |
| Cockatoo (Triton) | 410XS |
| Cockatoo (Umbrella) | 410XS |
| Conure (Black-Capped) | 404X |
| Conure (Blue Crown) | 408XS |
| Conure (Crimson Bellied) | 404X |
| Conure (Dusky) | 404X |
| Conure (Fiery Shouldered) | 404X |
| Conure (Golden) | 408XS |
| Conure (Green Cheek – smaller with a girth of approx. 5.5") | 404X |
| Conure (Green Cheek – average with a girth of approx. 6") | 404X |
| Conure (Half-Moon) | 404X |
| Conure (Jenday) | 406XS |
| Conure (Maroon Bellied) | 404X |
| Conure (Mitered) | 408XS |
| Conure (Nanday) | 408XS |
| Conure (Patagonian) | 408XS |
| Conure (Pineapple) | 404X |
| Conure (Sun) | 406XS |
| Conure (White Eyed) | 406XS |
| Crow | 408XS |
| Dove (Ring Neck, smaller) | 406XS |
| Dove (Ring Neck, larger) | 406XS |
| Eclectus (Grand) | 408XS |
| Eclectus (Red Sided) | 408XS |
| Eclectus (Solomon Island) | 408XS |
| Eclectus (Vos Maeri) | 408XS |
| Indian Ring Neck | 406XS |
| Jardine | 406XS |
| Lorie (Rainbow) | 406XS |
| Lorie (Smaller) | 406XS |
| Lorikeet, Rainbow (Australian) | 406XS |
| Lorikeet, Red Collar (Australian) | 406XS |
| Lorikeet, Scaly (Australian) | 406XS |
| Lovebird (Most) | 404X |
| Lovebird (Smaller) | 404X |
| Macaw (Blue & Gold) | 410X |
| Macaw (Blue & Gold - Larger) | 412X |
| Macaw (Green Wing) | 412X |
| Macaw (Hahns) | 406XS |
| Macaw (Hyacinth) | 412X |
| Macaw (Illigers) | 408XS |
| Macaw (Military) | 410X |
| Macaw (Red Headed) | 406XS |
| Macaw (Scarlet) | 412X |
| Macaw (Severe) | 408XS |
| Macaw (Yellow Collared) | 406XS |
| Parakeet (Alexandrine) | 406XS |
| Parakeet (American) | 404X |
| Parakeet (Canary-Winged or BB) | 404X |
| Parakeet (Lineolated) | 404X |
| Parakeet (Moustache) | 406XS |
| Parrot (Australian King) | 406XS |
| Parrot (Hawk-Headed) | 406XS |
| Parrot (Myers) | 406XS |
| Parrot (Red Bellied) | 406XS |
| Parrotlet | 404X |
| Pigeon | 406XS |
| Pionus | 406XS |
| Pionus (Maxmillian) | 406XS |
| Quaker | 406XS |
| Senegal (African) | 406XS |
| Starling | 404X |
