Bootstrap Input Sizing

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Bootstrap Input Sizing
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Input Sizing in Forms
Set the heights of input elements using classes like .input-lg and .input-sm.

Set the widths of elements using grid column classes like .col-lg-*and .col-sm-*.

Height Sizing
Small input
Default input
Large input
The following examples shows input elements with different heights:

Example
<form>
  <div class="form-group">
    <label for="inputdefault">Default input</label>
    <input class="form-control" id="inputdefault" type="text">
  </div>
  <div class="form-group">
    <label for="inputlg">input-lg</label>
    <input class="form-control input-lg" id="inputlg" type="text">
  </div>
  <div class="form-group">
    <label for="inputsm">input-sm</label>
    <input class="form-control input-sm" id="inputsm" type="text">
  </div>
</form>
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You can quickly size labels and form controls within a Horizontal form by adding .form-group-* to the <div class="form-group"> element:

Example
<div class="form-group form-group-lg">
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You can also quickly size all inputs and other elements inside an .input-group with the .input-group-sm or .input-group-lg classes:

Example
<div class="input-group input-group-lg">
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Column Sizing
col-xs-2
col-xs-3
col-xs-4
The following examples shows input elements with different widths using different .col-xs-* classes:

Example
<div class="col-xs-2">
  <label for="ex1">col-xs-2</label>
  <input class="form-control" id="ex1" type="text">
</div>
<div class="col-xs-3">
  <label for="ex2">col-xs-3</label>
  <input class="form-control" id="ex2" type="text">
</div>
<div class="col-xs-4">
  <label for="ex3">col-xs-4</label>
  <input class="form-control" id="ex3" type="text">
</div>
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Help Text
Use the .help-block class to add a block level help text in forms:

Example
<div class="form-group">
  <label for="pwd">Password:</label>
  <input type="password" class="form-control" id="pwd" placeholder="Enter password">
  <span class="help-block">This is some help text...</span>
</div>
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