Abstract: A modular organizational system for use in organizing a suitcase includes an insert portion having opposed top and bottom panels a pair of opposed side panels extending between therebetween. The panels of the insert portion have inner surfaces that define spaced apart grooves. A plurality of primary panels includes upper and lower edges selectively received in the plurality of grooves of the top and bottom panels, each primary panel having an inner edge defining a plurality of slots. The system includes a plurality of auxiliary panels, each auxiliary panel having an outer edge defining a slot extending away therefrom configured for mating with a respective slot of a primary panel, respectively. A plurality of pegboard panels are attached to inward edges of the top, bottom, and side panels, respectively, the plurality of pegboard panels defining a plurality of spaced apart holes suitable for hanging articles.