Avatar Size

Ok then, why don't you just experiment with an avatar size, and see how it comes out?
If not, just try again, until an acceptable size.
Should be easy enough.

Tried a smaller length and width. It displayed the same size as the current avatar, but very pixelated (grainy).

Apparently the avatar must be a perfect square. Mine "was" a rectangle. I made it a square and voila' there it is.