To make the icons for twitter and facebook bigger, follow these steps:
- Find some bigger icons and upload them to your Assets area (Theme > Template Editor). http://www.iconfinder.net/ is a great tool for finding free and commercial icons.
- In theme.liquid, near the bottom, replace the existing icon filenames with the names of the files you just uploaded. Save & Close.
- In styles.css.liquid, find "#bottom ul.social li img" and change the width and height dimensions to match your new icons. Save & Close.