Instructions
Determine how much space your bird needs to stretch its wings and flap them without hitting the bars. The more space you give your bird, the better. Your bird will be living in its cage most of its life. It's not like a different kind of pet that you often let out of its kennel on a daily basis.
Base your proper bird cage size on the breed of your bird. While bird cage size should largely be based on how big your bird is, there are exceptions. Finches are rather small birds, but they need a large cage because they exercise often in their cages. Some smaller birds need a rather tall cage because they have large tails.
Get a bigger cage than you think you need, if you can swing it. Bigger is always better when it comes to getting the proper bird cage size for your bird. If you get a cage that is bigger than one you really needs, that allows your bird to have more room for exercise and to learn acrobatic tricks.
Look at how much room you have in your house. Wherever you're planning on putting your bird cage, measure how much space you have for your new addition. Many people dedicate large rooms of their homes to their bird cages.
How to Determine Proper Bird Cage Size
A bird cage needs to be large enough to give the bird plenty of space and small enough to fit in the space you've dedicated to your pet. Determining the proper bird cage size is different from determining kennel size for a dog or a cat because those pets don't need as much room to run around in their kennels.