Avatar file size

The personal gallery allows the width and height to be changed but
how about the file size?
How do I change it?


In the avatar control panel:

Displays a small graphic image below your details in posts.
Only one image can be displayed at a time,
its width cannot exceed 150 pixels,
the height cannot exceed 150 pixels,
and the file size cannot be higher than 64 KB.


My question again is:
How do I increase the file size to higher than 64KB.

Any help to this will be greatly appreciated!!

You cannot change it.