Life In 19x19

i have 140x140 and it seem to be the perfect size.
originally i had 200 and it seems too big so i changed it.

I use 150x300 on another forum. It enables larger (longer) avatars that typically don't cause any extra scrolling, while preventing that one annoying person from having a slightly wider avatar that throws off the page layout. (120x200 or 138x200 would probably work fine too.)