Woocommerce single product gallery scrolling thumbnails

/* VERSION 1 - Vertical Scrolling Thumbnails */

.woocommerce div.product div.images .flex-control-thumbs li {
    padding: 5px 5px 0 0;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

@media (min-width: 420px) {
    .woocommerce-page div.product div.images {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -ms-flex-item-align: center;
        align-self: center;
    }
    .woocommerce div.product div.images .flex-control-thumbs {
        -webkit-box-ordinal-group: 0;
        -ms-flex-order: -1;
        order: -1;
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        -ms-flex-direction: column;
        flex-direction: column;
        -webkit-box-flex: 1;
        -ms-flex: 1 0 80px;
        flex: 1 0 80px;
        /* Adjust PX to suit width of thumbnails */
        max-height: 425px;
        /* Adjust Height to Image height on desktop */
        overflow: auto;
    }
    .woocommerce div.product div.images .flex-control-thumbs li {
        width: 100%;
        padding: 0 10px 10px 0;
    }
}

/* VERSION 2 - Horizontal Scrolling Thumbnails */

.woocommerce div.product div.images .flex-control-thumbs li {
    padding: 5px 5px 0 0;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-box-flex: 1;
    -ms-flex: 1 0 25%;
    flex: 1 0 25%;
}

.woocommerce div.product div.images .flex-control-thumbs {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    overflow: auto;
}