How to put up an avatar photo

This might be a really silly simple question but how do i get my avatar to show up on forum posts? I have a picture in an album and i'm sure i've set that as my picture. Does it have to be a certain size or something?

All help appreciated :)

https://www.rtoc.org/boards/profile.php?do=editavatar

Thanks for this, I was struggling getting mine to work as well :agree::agree:

Thanks!