An adjustable shelf reducer for use with a retail display to create a visually-appealing, full display of products contained on the shelf. The adjustable shelf reducer includes an L-shaped support having a backing member coupled to a base. One or more spaced-apart openings between the backing member and the base permit the passage of longitudinal spacer slats. The depth of the shelf display may be adjusted by sliding the spacer slats through the openings in the support and securing them in place at a pre-selected distance to create an aesthetically-pleasing and easy-to-access retail display.