Make Font Awesome icons in a circle?

Question

I am using font awesome on some project but I have some things that I want to do with font awesome icons, I can easily call an icon like this:

Answer 1

The below example didnt quite work for me,this is the version that i made work!

HTML:

CSS:

.social-links {
    text-align:center;
}

.social-links a{
    display: inline-block;
    width:50px;
    height: 50px;
    border: 2px solid #909090;
    border-radius: 50px;
    margin-right: 15px;

}
.social-links a i{
    padding: 18px 11px;
    font-size: 20px;
    color: #909090;
}