- 1. Create a fun avatar here: http://www.faceyourmanga.com/editmangatar.php or here: http://avachara.com/avatar/
2. Then resize to 90x90
3. Use an online GIF optimizer to shrink the file. Something like: http://ezgif.com/optimize
The optimizer will show you the filesize and give you a variety of ways to make the file smaller.