Can I draw a box around a checkbox list?

I created a check box list of about 30 items that are in 2 rows.  Is there a way to draw a box around this so it looks separate from the rest of the form?

You can achieve that by adding this CSS code on your form

#cid_21{

border: 2px solid black !important;

padding: 10px !important;

}

Using this guide: How-to-Inject-Custom-CSS-Codes

And that would result to this: 

If you're not satisfied with the output and you need further assistance, please do not hesistate to get back to us and we will be glad to help you anytime. Thank you.