HTML Table altezza e larghezza

<table width="500" border="4">
  <tr>
    <th width="25%">Colonna 1</th>
    <th>Colonna 2</th>
  </tr>
  <tr>
    <td height="75">Corta e alta</td>
    <td>Larga e alta</td>
  </tr>
  <tr>
    <td>Corta e bassa</td>
    <td>Larga e bassa</td>
  </tr>
</table>