# 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

The following examples shows input elements with different heights:

## Example

<form class="form-inline" role="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

<form class="form-horizontal" role="form">
<div class="form-group form-group-lg">
<label class="col-sm-2 control-label" for="lg">form-group-lg</label>
<div class="col-sm-10">
<input class="form-control" type="text" id="lg">
</div>
</div>
<div class="form-group form-group-sm">
<label class="col-sm-2 control-label" for="sm">form-group-sm</label>
<div class="col-sm-10">
<input class="form-control" type="text" id="sm">
</div>
</div>
</form>
Try it Yourself »

## Column Sizing

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>
Try it Yourself »

## 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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