Hi,
Since the WoodMart theme offers numerous ways to display products — including three supported product builders, page layouts, various predefined product loop designs, and the Product Loop Builder — the method for adjusting the border may vary depending on your site’s configuration.
In your screenshot, you noticed a product border from a design specifically created using the Product Loop Item Builder for the “Electronics 3” demo. To set or change the border using the Product Loop Builder, you need to open the Loop Builder editor, go to Loop Item Settings, navigate to the Style tab, then Border, and configure it there. Screenshot https://monosnap.ai/file/aEZIuzjUJlpBPLevu7l7b9WkU6wa7i.
More about product loop item builder you can find in our documentation https://xtemos.com/docs-topic/product-loop-item-layout-builder/
Kind Regards