I have 2 lovebirds that I've been keeping in a tall, but not really wide or deep cage, bar spacing is 1/2". It's fine for them, but I wanted to get a larger cage.
I found a really nice used cage that is a bit shorter, but much wider and deeper. The bars are 3/4" apart, so I looked up on That Pet Place what bar spacing is correct for lovebirds. That site said "no more than 3/4", so I bought the cage. Now I see on here and other places that lovebirds should have bars spaced no more than 5/8".
I'm so upset and worried that I haven't moved my birds into the new cage.