While you consider booking your pet domestically or internationally through airline one must have IATA approved fibre crate. They come in different sizes ranging from 21 inches to 42 inches in length. You can choose the crate as per the size of the breed.
These crates are designed to ensure pet safety and comfort while in travel. It is mandatory requirement for airline and is a must for Indian Railway but only for cat transportation. The crates are recommended while a pet travels through the road to ensure its safety. These cages are strong, stable and sturdy. Hence, during landing and take-off, it ensures pet safety. Moreover, it has a wired mesh steel door which ensures ventilation etc. The big cages often comes with wheel for easy movement also has a provision to offer water and food to pets.
The appropriate size for your pet can be chosen from length - Tip of the nose to tail, Width- across shoulder, height - head to floor.