Örneğin şöyle bir tablonuz var:

<div class="container">
  <h2>Basic Table</h2>
  <p>The .table class adds basic styling (light padding and only horizontal dividers) to a table:</p>            
  <table id="myTable" class="table">
    <thead>
      <tr>  <th> Firstname </th><th> Lastname </th><th> Email            </th></tr>
    </thead>
    <tbody>
      <tr>  <td> John      </td><td> Doe      </td><td> [email protected] </td></tr>
      <tr>  <td> Mary      </td><td> Moe      </td><td> [email protected] </td></tr>
      <tr>  <td> July      </td><td> Dooley   </td><td> [email protected] </td></tr>
    </tbody>
  </table>
</div>

Bootstrap'ta table class'ı varsayılan olarak width: 100% stiline sahip. CSS ile bu işlemi overload edin.

#myTable { width:auto !important; }