140 pixels works best in
ALL screen resolutions. Pointless having a nice shot on your screen and all everyone else can see is half a face or as you have it now. Never do it just on how it looks on your screen as lets be honest, we want people to see our avatars, it's not their just for our own thrills lol and it makes our posting space, our own. You need something that works on most of not all screen sizes, same as signatures. Some of the sigs need scroll bars and to be honest they look like arse lol.