Cannot get form elements to stay the size I set them on my web page. all seem to go to 100% on my site, however they appear the correct size on the page created by the form builder.

Is the page your form on responsive? What size is your design screen? Try maximizing your form builder design window.

Sorted it! Checked the theme and I just used the responsive theme, swapping to non-responsive and it worked just fine. Thanks.