Hi,
On the default template one radio label should grow to use as much space as needed before starting of the next radio choice. If this is not so, it can be adjusted using CSS.
If you would rather like to options to display vertically, like similar to the checkboxes, then you can add
class="radio radio-vertical" in the xml.
Further you would need to define following CSS in your css file:
.radio.radio-vertical label {
float: left;
}
.radio.radio-vertical input[type="radio"] {
float: left;
clear: left;
margin: 2px 2px 2px -20px;
}
This is just an example you might need to adjust or set some more css styling depending on your template.
Hope this helps. Thanks.