Aspects of the disclosure relate to a spacer device for use with a merchandise display. The merchandise display may include a first upright and a second upright opposite the first upright, a pegboard mounted between the two uprights, and at least one shelf mounted to the two uprights, wherein the configuration includes a gap between a back of the shelf and the pegboard. The spacer device may include two opposing ends. Each of the opposing ends may include a support arm that extends downward towards the gap, a mounting arm that extends downward towards the gap, and a tab that projects outward and away from the mounting arm. The spacer device may also include a gap filler portion extending between the two opposing ends wherein when the device is secured in the gap, the gap filler portion fills the gap.