A sealed package containing a pourable food product and comprising a bottom portion, a top portion and a main portion interposed between the bottom portion and top portion and including a plurality of side wall portions; the main portion is divided from the bottom portion and said top portion respectively by a bottom peripheral outline and a top peripheral outline extending transversally with respect to a longitudinal direction; each of the bottom peripheral outline and the top peripheral outline has a broken-line shape and is formed by a plurality of contour edges joined to each other; the bottom portion comprises a quadrilateral bottom panel delimited by the bottom peripheral outline and extending orthogonal to the longitudinal direction; the top portion comprises a quadrilateral top panel delimited by the top peripheral outline and extending transversally to the longitudinal direction; the area of the bottom panel is different from the area of a top quadrilateral obtained by projecting, along the longitudinal direction, the top panel on a reference plane parallel to the bottom panel, crossing the package and containing at least one of the contour edges of the top peripheral outline.