Avatar size

How can I change my Avatar size? I think it must be possible to change the size because I'm a member of, a run a few forumotion forums and they nearly all have diffrent avatar sizes.

Heres a few examples of what I mean.

here


from one of the boards I'm a member of


and finaly, from my faction forum




So, how do you change the size?

admin panel
display
avatars
avatar gallery

click on personal avatar tab

here you can change size limits

click save