24 x 24 x 30 for the cage, and get a material that is appropriate for conures. Wrought iron, stainless, etc. The powder coating on that cage is being chipped already and while it’s non toxic the bird could be getting bits in his stomach and that’s not good. As well, the wire under the powder coating is not always toxin free. And lastly, eventually he could chew his way out or bend the bars and get himself free.
The prevue cages & kings cages are good.
Bar spacing 1/2” - 5/8”. Some people say 3/4” is okay but smaller conures can still stick their heads out and that can lead to broken bones or other injuries. Perches are recommended to be about 1” for GCCs, not sure for a sunnie. Make sure you have a variety of different textures (wood, rope, leather, etc.) and take note of which he likes so you can get more. Also make sure he has shreddable toys, foraging toys, noisy toys, etc.
Just because a bird is big enough to stand up and turn around/move around a bit in a cage doesn’t mean it’s big enough. Ideally, you want to buy the biggest one in your budget that matches the proper bar spacing requirements. In the wild birds are go, go, go. At home, if your bird does not have enough space he will begin to exhibit stress behaviours which could include aggression, self-mutilating, etc. So it’s very important you give him as much enrichment as possible.
