.stm_icon_links_style_6 a {
    display: inline-block;
    min-width: 30px;
    min-height: 30px;
    line-height: 28px;
    text-align: center;
    border-radius: 50%;
}

.stm_icon_links_style_6 a:not(:last-child) {
    margin-right: 15px;
}

.stm_icon_links_style_6 a i {
    font-size: 14px;
}