Abstract: A multiple pocket, expandable envelope is formed by folding panels of a planar, unitary blank relative to each other. The envelope has a front, a back, and a pair of intermediate panels hingedly coupled to each other along parallel end edges. A front divider panel is disposed between the front panel and one of the intermediate panels while a back divider panel is disposed between the back panel and the other of the intermediate panels to define four pockets within the envelope. The back panel is hingedly coupled to the back divider panel along a fold line at one side thereof. The one intermediate panel is hingedly coupled to the front divider panel along a fold line at one side thereof. A plurality of side panels hingedly couple the front panel to the front divider panel and the other intermediate panel to the back divider panel.