The size of the fields on the web page will most likely be determined by css applied to the form elements, use Firebug in Firefox to help pinpoint.
Thanks for your help - I will give firebug a shot. Although when I was editing the form the CSS was updating as I made changes - assumed this would be automatically handled when working with BC.
Inline styles can be added by editors like other CMS's and depending on the build pre-defined styles will make things look and feel as specified in a design but no CMS will really generate Styles for you as your thinking.
If there is no pre-defined styles or you want to modify them you will need to adapt and change the CSS
So better to work in dreamweaver - thanks