<table>
  <tr><td>foo</td><td>bar</td><td>bar 2</td></tr>
  <tr><td>foo</td><td>bar</td><td>bar 2</td></tr>
  <tr><td>foo</td><td>bar</td><td>bar 2</td></tr>
  <tr><td>foo</td><td>bar</td><td>bar 2</td></tr>
</table>

table tr td             { width: 20em; }
table tr td:first-child { width: 10em; }