An exchangeable magazine (1) for a storage shelf (54) comprises two side walls (3, 4) interconnected via webs (5), superimposed items (2) being stacked therebetween, the side walls (3, 4) including lower, inwardly angled end portions (17) for supporting the item stack. To adapt the magazine to different dimensions of the items (2), the mutual distance of the side walls (3, 4) is adaptable to the width (B) of the items (2) by aid of the webs (5) wherein on at least one side wall (3, 4), at least one guide rail (18) extending in parallel to the side walls (3, 4) and capable of engaging the item stack over the height thereof is mounted to be displaceable in the direction of the depth (T) of the items (2).