How to reduce the width of all first name and last names in my form

Dears

I need to reduce the width of the first and last name box in my form

BR

Hello.

If you are looking for a way to reduce width of all first and last names so that they appear in a single line, please try injecting the following custom CSS:

[data-type="control_fullname"] .form-sub-label-container {
  width: 49% !important;
  margin-right: 0px !important;
}

As your previous custom CSS that was present in the textbox of Designer under CSS tab contained an error, I had to remove it for everything to work correctly.

Here is a demo form with the edits applied: http://form.jotformpro.com/form/51604737912961

It will make your form look like this:

Please let us know if you need further assistance.