.btn-refresh {
    border: none;
    background-color: gainsboro;
    padding: 2px 2px 2px 4px;
    font-size: 16px;
    height:20px;
    vertical-align: sub;
}

    .btn-refresh:before {
        content: url(refresh.svg);
        width: 15px;
        float: left;
        margin-right: 5px;
        margin-top: -2px;
    }