Reply To: choose free gift images

[Soft79]

You could try this custom css (see https://en.support.wordpress.com/custom-design/editing-css/ ):

/* Reduce image size */
.wjecf-select-free-products  img {
    height: auto;
    max-width: 100%;
    display: block;
}

/* Remove white-space on cart page */
tr.wjecf-fragment-cart-select-free-product.wjecf-auto-submit {

    padding-left: 0;

}

…but I’m no css expert so for fancier customizations maybe it’s best to contact your theme author.