MySQL - Size of Table

How can I get size of table in my MySQL DB ?

Here's a function I wrote awhile ago to get all the tables from a database, plus their number of rows and size:

Code:

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function gettableinfo($tdb) { '$tdb is the database

    $sql_result = "SHOW TABLE STATUS FROM " .$tdb;
    $result = mysql_query($sql_result);

    if($result) {
        $size = 0;
        $stuff = '<table cellpadding="2" cellspacing="0" style="border: 1px solid #000000; width: 250px;">
            <tr>
                <td style="border-bottom: 1px solid #000000; padding-left: 4px; padding-right: 4px;"><b>Table Name</b></td>
                <td style="border-bottom: 1px solid #000000; padding-left: 4px; padding-right: 4px;"><b>Records</b></td>
                <td style="border-bottom: 1px solid #000000; padding-left: 4px; padding-right: 4px;"><b>Size</b></td>
            </tr>';
        while ($data = mysql_fetch_array($result)) {
            $size = $data["Data_length"] + $data["Index_length"];

            $stuff .= '<tr>
                <td style="padding-left: 4px; padding-right: 4px;">' . $data['Name'] . '</td>
                <td style="padding-left: 4px; padding-right: 4px;">' . $data['Rows'] . '</td>
                <td align="right" style="padding-left: 4px; padding-right: 4px;">' . formatsize($size) . '</td>
            </tr>';
        }
        $stuff .= '</table>';

        return $stuff;
    }
}

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Thanks