musaboru

Hey welcome.
If you have a tendency to love your plant too much (e.g. overwatering) then don't get a pot too large and you need a good draining potting soil.

I don't claim my advice as expert, but I follow this example, if it is growing in a one gallon pot and needs repotting (the roots hanging out the drainage holes) then go up another pot level to a 2 or 3 gallon pot. And so on as the plant grows. I think the size of the rootball is more of a factor in choosing the next pot size.

From my experience, it is usually ok to overpot a banana into a really large pot since they aren't as likely to get root or corm rot, but it is still possible if conditions are right for it. Anyways, banana plants will eventually need large pots if you want for it to grow big and healthy.