I've looked through all the options and I can't figure out how (if there is an option) to make the entire frame taller/wider. I know that you can make individual bars (health/mana) taller, but unless you can make the entire frame taller (height) it just squishes everything together.
You can resize the frames using three options: scale, height, and width. Each frame can be done individually, and I don't have my computer in front of me, but I think the sizing options can be found somewhere around [frame name] --> [other], or something like that.
Sorry I can't be of more help, but the options are definitely there.