HTML:
<div>
<label> <input type="radio" name="toggle"> On </label>
<label> Off <input type="radio" name="toggle"> </label>
</div>
CSS:
div { overflow:auto; border:1px solid #ccc; width:100px; }
label { float:left; padding:3px 0; width:50px; text-align:center; }
input { vertical-align:-2px; }
Live demo: http://jsfiddle.net/scymE/1/