Changing social buttons at bottom of blog post

Hello,

We really like that this template incorporates the option of having social share buttons at the bottom of every blog post. However, we’re not fans of the look of the default buttons this theme uses (the ones that stretch to the full width of the post). We’re wanting smaller social buttons (your ordinary small, circular buttons, for example) but have no idea how to implement these under blog posts or replace the default style with something more along the lines of what we’re looking for.

Any assistance with this would be greatly appreciated. Thank you.