Set column width on th, td, or both?

Question

Using CSS, I want to specify certain widths for columns in a table. Should I set the widths in the thead (on the th's), in the tbody (on the td's)...or both?

Answer 1

The <th>'s would be the best place to set the width, because it is iterated only once.

Save your client a few bytes.

The other <td>'s will shape out implicitly.