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 How to change the size of Form controls in Bootstrap

Answer»

Use the CLASSES .input-lg and .input-sm to change the size of form controls in Bootstrap:

The following is an example:

<!DOCTYPE html&GT; <html lang="en"> <head>   <title>Bootstrap Form Input Sizing</title>   <meta charset="utf-8">   <meta name="viewport" content="width=device-width, initial-scale=1">   <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">   <SCRIPT src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <div class="container">   <h2>Sizing Form Input Controls</h2>   <form>     <div class="form-group">       <label for="inputdefault">Regular input size</label>       <input class="form-control" id="inputdefault" type="text">     </div>     <div class="form-group">       <label for="inputlg">Large input size</label>       <input class="form-control input-lg" id="inputlg" type="text">     </div>     <div class="form-group">       <label for="inputsm">Smaller input size</label>       <input class="form-control input-sm" id="inputsm" type="text">     </div>   </form> </div> </body> </html>

The output displays regular, large and smaller inputs:



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