Bigger social media icons

Is there a way to make the social media icons bigger without a plugin?

 

Paste the following code in your custom css
Appearance -> Theme Options -> Styling Options -> Custom CSS

Code:

.footer-navi .navigation .right-navi a img {
width: 35px;
height: 50px;
}
.footer-navi .navigation .right-navi {
width: 450px ! important;
}

Change these values as per your requirement.
This will solve your issue.