Hello,

Please add this code to the Theme Settings > Custom CSS

.woodmart-hover-tiled .woodmart-buttons {
    background-color: transparent!important;
    -webkit-box-shadow: none!important;
    box-shadow: none!important;
}
div.woodmart-hover-tiled .woodmart-buttons > div a {
    width: 45px;
    background-color: #fff!important;
    -webkit-box-shadow: 1px 1px 1px rgba(0,0,0,.1)!important;
    box-shadow: 1px 1px 1px rgba(0,0,0,.1)!important;
    border-radius: 50%;
}

Best Regards