A 3D shelf talker in the form of a planar substrate has a profile and scored fold lines defining three advertising panels for displaying text and/or graphics identified with a product, and at least one fastener panel integral with one of the advertising panels and adherable to another of the panels for stabilizing the shelf talker once erected into a hollow rectangular parallelepiped. The fastener panel may be provided with a connector for mounting the shelf talker on a shelf fixture in an aisle of a store where one of the advertising panels is visible for indicating the location of the product to a customer along either end of the aisle or directly opposite the product.