Hello all,
Despite my efforts and numerous tries, I am still unable to increase the default avatar size for the avatars as they show up within threads. The avatars were all transferred from the old platform, but they were sized down and some of them were cropped (my previous Ishida avatar was among them).
If you're not satisfied with you your avatars look, I would advise you to re-upload them as square images.
The system asks of you to upload images that are at least 400x400 pixels big.
If you upload images that are not square, they will be cropped, but at least in that case, you can move the avatar within the dialogue box to see which cropping suits you the most.
I may try to find a way to increase them again, but for now, the explanation above is my best advice to you all.