#1. First, you access Custom CSS box
#2. Enter the code like below and click Save
/* Sale text over image */ .product-mark.sale { position: absolute; top: 5px; right: 5px; background-color: black; color: white !important; padding-left: 5px; padding-right: 5px; padding-top: 5px; padding-bottom: 3px; }
#3. You will have a result like this