the.css

.background{
    display: block;
    border-radius: 10%;
    width: 32px;
    height: 32px;
    background: #000;
    padding: 10px 15px 15px 10px;
}

.stroke{
    background: white;
    border-radius: 50%;
    padding: 2px;
    width: 100%;
    height: 100%;
}

.inner-circle{
    background: #000;
    border-radius: 50%;
    width: 100%;
    height: 100%;
    text-align:center;
    line-height: 2.1em;
    color: #fff;
}