Set a fixed width on the cells, if you take to edit the cells, you get the option.
Thanks. I've also decided to use css.
<style type="text/css">
table.sample {
border-width: 1px;
border-spacing: 2px;
border-style: none;
border-color: #3E88FF;
border-collapse: collapse;
background-color: #ffffff;
}
</style>
<table border-color=""
style="width: 75%; text-align: left; margin-left: auto; margin-right:
auto; background-color: rgb(255, 255, 255);"
class="sample" border="1">
<tbody>
<tr>
<td style="vertical-align: top; text-align: center;" width="20%"><br>
</td>
<td style="vertical-align: top; text-align: center;" width="20%"><br>
</td>
<td style="vertical-align: top; text-align: center;" width="20%"><br>
</td>
<td style="vertical-align: top; text-align: center;" width="20%"><br>
</td>
<td style="vertical-align: top; text-align: center;" width="20%"><br>
</td>
</tr>
</tbody>
</table>