How can I increase the width of my check box options

I can't make my check box options look nice.  I have attempted inserting the code that has been in numerous posts and it isn't working. 

Hi,

Try adding this code to your form:

http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes

.form-checkbox-item {
    min-width : 600px !important;
}

Adjust the value to your liking. 

Here is my test form with the code added:

https://form.jotform.com/60216440028949

If the width was not what you were looking to change, let us know specifically what you would like to look different and we will be happy to help.