Controlling Browser widget sizes (checkbox, radio button)

[Python]

The http://HowsYourCare.org web site is collecting data from
hospitalized folks in an effort to evaluate quality of care.  There have
been some complaints that the buttons are too small.

There is no control in the tag attributes for size and font size has no
effect.  My googling and searching through firefox about:config have not
turned up any way to adjust the size of input widgets.  (<input
type="radio" or type="checkbox")

Is there an alternative to using button tags (I can set their size) +
Javascript to get the radio effect where pushing one button "unpushes"
the other buttons?

-- 
Lloyd Kvam
Venix Corp