Footer Widget Adjustments

Hi,

I've got my site set so it has 3 widget areas in the footer. By default, each of them takes up the same amount of space, so it's a 1/3, 1/3, 1/3. Is there an easy way to adjust this? So, if I wanted to make one of the widget areas bigger (and then one obviously needs to be smaller to compensate).

Thanks,

Pat