Abstract: The invention relates to a device (1) for manufacturing stacks (11) of product units (9), in particular of printed products. The device (1) comprises a stacking device (2) with a plurality of support units (7) which in each case form a support surface (19) for the stacks (10) to be formed, furthermore a circulatory arrangement (31), in which the support units (7), arranged one after the other along a closed circulatory path (U), can be moved into and out of a stacking region (S). The support units (7) moreover in each case comprise at least two support elements (8a, 8b) which are arranged next to one another. The stacking device (2) comprises means (20a, 20b, 21) for setting the distance (D2) between the lateral outer edges (56a, 56b) of the support units (7) with a continued conveying operation.