a rack assembly includes a plurality of stacked rack elements adjacent ones of which are connectable to each other to form a terraced rack display . each rack element is in the shape of a rectangular housing having bottom , rear and side walls . male connecting members depend downwardly from the frontal portions of the bottom walls of each of the rack elements and are adapted to be snappingly inserted into mating female connecting members provided on the rear walls of cooperating rack elements . the mating female connecting members are spaced upwardly relative to the bottom walls on each rack element so that each succeeding or rearwardly disposed rack element is additionally upwardly elevated in the engaged conditions of the male and female connecting members . additionally , inverted l - shaped planar female openings are provided in each of the side walls for receiving similarly shaped or inverted l - shaped planar male members . the l - shaped female openings are oversized and readily receive the l - shaped male members in a first initial position of two adjacent or back - to - back rack elements , the planar female openings being provided with an inclined edge or a surface which draws the two adjacent rack elements into close abutment when the elements are moved longitudinally relative to each other from the initial to the engaged locked condition of the l - shaped planar members within the associated planar female openings .