$row['avatar_sizes'] = array(
                "tiny"   => AvatarUtility::Format($row['user_avatar'], 25, 25),
                "thumb"  => AvatarUtility::Format($row['user_avatar'], 50, 50),
                "small"  => AvatarUtility::Format($row['user_avatar'], 75, 75),
                "medium" => AvatarUtility::Format($row['user_avatar'], 100, 100)