.widget_sponsors_widget ul.horizontal li.sponsors-item img {
    max-height: none!important;
    width: auto;
    max-width: none!important;
    height: 80px;
}
.thahugepartners .widget_sponsors_widget ul.horizontal li.sponsors-item img {
    max-height: none!important;
    width: auto;
    max-width: none!important;
    height: 135px;
}