img {
     width: 50px;
     height: 50px;
}

 public function UploadAvatar($sFile, $oUser, $aSize = array()) {

        if (!F::File_Exists($sFile)) {
            return FALSE;
        }
        if (!$aSize) {
            $oImg = E::Module('Img')->CropSquare($sFile, TRUE);
        } else {
            if (!isset($aSize['w'])) {
                $aSize['w'] = $aSize['x2'] - $aSize['x1'];
            }
            if (!isset($aSize['h'])) {
                $aSize['h'] = $aSize['y2'] - $aSize['y1'];
            }
            $oImg = E::Module('Img')->Crop($sFile, $aSize['w'], $aSize['h'], $aSize['x1'], $aSize['y1']);
        }

<img src="http://altocms.ru/uploads/images/00/00/00/avatar/avatar_crisp_male.png-64x64.png" alt="smalex" title="smalex" class="avatar">

.entry-comments footer img {
    background: #d8dfe5;
    float: left;
    width: 50px;
    height: 50px;
    -webkit-border-radius: 60px;
    border-radius: 60px;
}