As the most external tissue layer, the epidermis is an essential component of the interface with the (a)biotic environment. This important function requires tight physical associations between adjacent cells. In plants, the presence of jigsaw puzzle shaped cells in certain epidermis types has been proposed to increase mechanical resistance to tensile stresses in these tissues. Puzzle shape leaf pavement cells displaying interdigitated lobes and indents in the two-dimensional plane of the leaf epidermis, provides a powerful model system to investigate the cellular and subcellular processes underlying cell polarity and shape determination in plant tissues. We will present the latest advances from our group on the process of cell shape acquisition.