iCheck radio buttons and check boxes

HTML

<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/iCheck/1.0.1/skins/square/grey.css"/>
<form>

<label style="float: left;" for="halstuch">Halstuch<br><span style="font-size:14px;">3,00 EUR</span></label>	
<input type="checkbox" required>

<input type="submit">
</form>


<script src="//cdnjs.cloudflare.com/ajax/libs/iCheck/1.0.1/icheck.min.js"></script>

JavaScript

$(document).ready(function(){
    $('input').iCheck({
        checkboxClass: 'icheckbox_square-grey',
        radioClass: 'iradio_square-grey',
        increaseArea: '20%' // optional
    });
});