Where can I get avatars for a chat room?

I have a chat room from Add on Chat. I need some avatars to go next to peoples names but I can’t find any small enough. I’ve tried downloading pictures from the internet and using them but they fill the screen as they are so big.
Where can I get some proper avatar pictures from? The ones that come with it are so basic and rubbish. I don’t want the sparkly animated ones, just the basic pictures.

Many Thanks.

you could try here

http://www.shrinkpictures.com/create-avatar/