Confused with my avatar..

[Arguable]

OK, i've only had habboxforum account for over a week..
But i've been confused about my avatar.
I keep finding good pictures, I make them my avatar but they're tiny!
So i tested another users avatar and it was small than there's..
I'm doing something wrong, HELP!:S

[--ss--]

There's a set limit on how big your avatar can be on certain usergroups , The images you find are probably too big so they get resized