HTML

bootstrap table cells height

table tr td{
   padding:0px !important;
}

bootstrap table same width

<tr>
  <th style="width: 16.66%">Col 1</th>
  <th style="width: 25%">Col 2</th>
  <th style="width: 50%">Col 4</th>
  <th style="width:  8.33%">Col 5</th>
</tr>

bootstrap table cells height

table.class_selector td{
   padding:0px !important;
}