<table id="my-table"><tr>
<td> CELL 1 With a lot of text in it</td>
<td> CELL 2 </td>
<td> CELL 3 </td>
<td> CELL 4 With a lot of text in it </td>
<td> CELL 5 </td>
</tr></table>
#my-table{width:100%;
border:1px solid black;} /*or whatever width you want*/
#my-table td{
width: 2%;
/* width: 2000px; */
border: 1px solid red;
} /*something big*/
#my-table td:nth-child(1) {
}