How to put First and Last Name field on the same line?

Having trouble with the Field Full Name. I want First and Last to be on their own lines and be the same width as the rest of the fields OR I want the First and Last to be on the same line and it be the same width (combined) as the other fields.

How do I fix this?

Many thanks! 

It seems that you have already added some code to your JotForm. Please try injecting the following CSS code to your JotForm.

[data-type="control_fullname"] .form-sub-label-container {

    width: 47%;

}

It should be displaying as shown below after adding the code to your JotForm.

Hope this information helps!