/* 1:1 container */
.products.row .product-item .product-image {
  position: relative;
  width: 100%;
  padding-bottom: 100%;    /* square */
  background-color: #fff;  /* white background */
  overflow: hidden;
}

/* image scales down to fit, centered */
.products.row .product-item .product-image img {
  position: absolute !important;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
  object-fit: contain;     /* fit entire image */
  object-position: center; /* center it */
  display: block;
  background-color: #fff;  /* in case PNG transparency */
}