The previous maximum displayed banner size is 912 x 300.

The current maximum is 1770 x 300 but dynamically changes as you shrink your browser window.

The community icon remains the same at 150 x 150.

You can see how this messed up even this community’s banner by cutting off the lemmy.world mascot at the top. If you have text in your banner, you’ll need to position them closer to the center than before. It can be… mildly infuriating.