Buttons

<div class="btn-group" role="group" aria-label="...">

  <button type="button" class="btn btn-default">Left</button>

  <button type="button" class="btn btn-default">Middle</button>

  <button type="button" class="btn btn-default">Right</button>

</div>

Justified button groups

<div class="btn-group btn-group-justified" role="group" aria-label="...">
  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default">Left</button>
  </div>
  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default">Middle</button>
  </div>
  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default">Right</button>
  </div>
</div>

Single button dropdowns

<!-- Single button -->
<div class="btn-group">
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Action <span class="caret"></span>
  </button>
  <ul class="dropdown-menu">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li role="separator" class="divider"></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>

Split button dropdowns

<div class="btn-group">
      <button type="button" class="btn btn-default">Default</button>
      <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li role="separator" class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->

Sizing

<div class="btn-toolbar" role="toolbar">
      <div class="btn-group">
        <button class="btn btn-default btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Large button <span class="caret"></span>
        </button>
        <ul class="dropdown-menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /btn-toolbar -->
    <div class="btn-toolbar" role="toolbar">
      <div class="btn-group">
        <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Small button <span class="caret"></span>
        </button>
        <ul class="dropdown-menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /btn-toolbar -->
    <div class="btn-toolbar" role="toolbar">
      <div class="btn-group">
        <button class="btn btn-default btn-xs dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Extra small button <span class="caret"></span>
        </button>
        <ul class="dropdown-menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /btn-toolbar -->

Button addons

<form class="bs-example bs-example-form" data-example-id="input-group-with-button">
    <div class="row">
      <div class="col-lg-6">
        <div class="input-group">
          <span class="input-group-btn">
            <button class="btn btn-default" type="button">Go!</button>
          </span>
          <input type="text" class="form-control" placeholder="Search for...">
        </div><!-- /input-group -->
      </div><!-- /.col-lg-6 -->
      <div class="col-lg-6">
        <div class="input-group">
          <input type="text" class="form-control" placeholder="Search for...">
          <span class="input-group-btn">
            <button class="btn btn-default" type="button">Go!</button>
          </span>
        </div><!-- /input-group -->
      </div><!-- /.col-lg-6 -->
    </div><!-- /.row -->
  </form>

Buttons with dropdowns


<form class="bs-example bs-example-form" data-example-id="input-group-dropdowns">
    <div class="row">
      <div class="col-lg-6">
        <div class="input-group">
          <div class="input-group-btn">
            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Action <span class="caret"></span></button>
            <ul class="dropdown-menu">
              <li><a href="#">Action</a></li>
              <li><a href="#">Another action</a></li>
              <li><a href="#">Something else here</a></li>
              <li role="separator" class="divider"></li>
              <li><a href="#">Separated link</a></li>
            </ul>
          </div><!-- /btn-group -->
          <input type="text" class="form-control" aria-label="Text input with dropdown button">
        </div><!-- /input-group -->
      </div><!-- /.col-lg-6 -->
      <div class="col-lg-6">
        <div class="input-group">
          <input type="text" class="form-control" aria-label="Text input with dropdown button">
          <div class="input-group-btn">
            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Action <span class="caret"></span></button>
            <ul class="dropdown-menu dropdown-menu-right">
              <li><a href="#">Action</a></li>
              <li><a href="#">Another action</a></li>
              <li><a href="#">Something else here</a></li>
              <li role="separator" class="divider"></li>
              <li><a href="#">Separated link</a></li>
            </ul>
          </div><!-- /btn-group -->
        </div><!-- /input-group -->
      </div><!-- /.col-lg-6 -->
    </div><!-- /.row -->
  </form>