A product merchandising unit having a plurality of shelf members adjustably positionable within a framework structure, each shelf member including a plurality of retractable pin members selectively movable for engagement with openings associated with the framework structure, and a plurality of removably attachable divider members engageable with the underneath portion of each shelf member anywhere along substantially their entire width, the divider members extending downwardly from the shelf member located thereabove into the product display space of the shelf member located therebelow forming product channels for guiding products therebetween, each divider member being selectively adjustable relative to another divider member to control and adjust the width of each product channel.