I only have 2 or maybe 3 images per product but the gallery is expecting lots, so it sets out 4 columns, which makes my images very small.
Therefore I need to have only 3 columns. The code below lets me set as many columns as I need.
.woocommerce div.product div.images .flex-control-thumbs li {
width: 33.33%;
}
and now it looks like this…
