Про аватарки.

[Diaryalive]

Размер. .avatar img { width:100 height:auto;}

.avatar img { width:80 height:auto;}

.avatar img { width:50 height:auto;}

Форма.
.avatar img { border-radius:20-webkit-border-radius:20-moz-border-radius:20-khtml-border-radius:20 -o-border-radius:20px!important; }	.avatar img { border-radius:60-webkit-border-radius:60-moz-border-radius:60-khtml-border-radius:60 -o-border-radius:60px!important; }	.avatar img { border-bottom-right-radius: 30px!important; border-top-left-radius: 30px!important; }
Обводка.
.avatar img { border:2px dotted #81735C !important;}	.avatar img { border:2px dashed #81735C !important;}	.avatar img { border:2px solid #81735C !important;}	.avatar img { border:4px double #81735C !important;}
.avatar img { border:4px groove #81735C !important;}	.avatar img { border:4px ridge #81735C !important;}	.avatar img { border:4px inset #81735C !important;}	.avatar img { border:4px outset #81735C !important;}