.woocommerce ul.products li.product,
.single-product .product { position: relative; }

.wc-product-label { position: absolute; width:40px; z-index:10; margin-bottom:5px; }
.wc-product-label img { width:100%; }

.top-left { top:10px; left:10px; }
.top-right { top:10px; right:10px; }
.bottom-left { bottom:10px; left:10px; }
.bottom-right { bottom:10px; right:10px; }
.top-center { top: 10px;   left: 50%; transform: translateX(-50%); }