Enlarge Social Icons

I am currently working on a site for the visually impaired and want to make sure that certain features that cannot be enlarged by a font resizer are more easily viewed by those with low vision. The icons are currently a bit too small and I’d like to make them larger. Is there a way to do this with the theme options or in the style sheets? Would a plugin help with this? Any help would be appreciated!

P.S. I LOVE this theme!