Hey @tapper65,
That’s the default layout for the product gallery thumbnail. If you wish to make it big, we need to add custom CSS. You may use the CSS code below and add it to your Global CSS.
.flex-control-nav.flex-control-thumbs li {
height: 50px;
width: 50px;
}
.flex-control-nav.flex-control-thumbs img {
height: auto;
}
Just change the height and width value to your desired outcome. Please note that custom CSS code is outside the scope of our support. Issues that might arise from the use of custom CSS code and further enhancements should be directed to a third-party developer or you can avail One where we can answer questions outside of the features of our theme.
Hope that helps.