A packaging element obtained from a single blank, precut and folded from a sheet of material, of the type in which - the packaging element includes a main enclosure comprising at least three main panels ( 21, 22, 23, 24) successively articulated to one another around longitudinal folding lines ( 31, 32, 33) that extend parallel to one another along a longitudinal direction, the folding lines defining longitudinal sides of the main panels, the enclosure being closed on itself to define a closed contour around an inner space of the packaging element in a transverse plane perpendicular to the longitudinal direction; - the packaging element includes, at least at a first longitudinal end, an end setting device ( 60, 80) including: • an end strip comprising the same number of end panels ( 61, 62, 63, 64) as the number of primary panels, successively articulated to one another around folding lines arranged aligned with folding lines of the main panels, the end strip being closed on itself to define a closed contour around an inner space of the packaging element in a transverse plane perpendicular to the longitudinal direction; • for at least two separate main panels, at least one longitudinal connecting tab that connects said main panel to a corresponding end panel, and the connecting tab of a main panel being separate from the connecting tab(s) of the other main panels, the connecting tabs being separated from one another transversely by a separating cutout in the sheet of material; of the type in which each connecting tab includes a transverse intermediate folding line that delimits a main part and an end part of said connecting tab, respectively attached to the corresponding main panel and end panel, to make it possible to bring the end strip of the main enclosure closer by folding two parts ( 80a, 80b) of the connecting tab on themselves around the intermediate folding line, and of the type in which the main part of the connecting tab is articulated to the corresponding main panel by a pre-marked transverse folding line ( 41, 42, 43, 44), characterized in that the end setting device is a bi-articulated device in which the end part of said at least two connecting tabs is attached to the corresponding end panel ( 61, 62, 63, 64) by a flexion zone with no pre-marked transverse folding line. - the packaging element includes a main enclosure comprising at least three main panels ( 21, 22, 23, 24) successively articulated to one another around longitudinal folding lines ( 31, 32, 33) that extend parallel to one another along a longitudinal direction, the folding lines defining longitudinal sides of the main panels, the enclosure being closed on itself to define a closed contour around an inner space of the packaging element in a transverse plane perpendicular to the longitudinal direction; - the packaging element includes, at least at a first longitudinal end, an end setting device ( 60, 80) including: • an end strip comprising the same number of end panels ( 61, 62, 63, 64) as the number of primary panels, successively articulated to one another around folding lines arranged aligned with folding lines of the main panels, the end strip being closed on itself to define a closed contour around an inner space of the packaging element in a transverse plane perpendicular to the longitudinal direction; • for at least two separate main panels, at least one longitudinal connecting tab that connects said main panel to a corresponding end panel, and the connecting tab of a main panel being separate from the connecting tab(s) of the other main panels, the connecting tabs being separated from one another transversely by a separating cutout in the sheet of material; of the type in which each connecting tab includes a transverse intermediate folding line that delimits a main part and an end part of said connecting tab, respectively attached to the corresponding main panel and end panel, to make it possible to bring the end strip of the main enclosure closer by folding two parts ( 80a, 80b) of the connecting tab on themselves around the intermediate folding line, and of the type in which the main part of the connecting tab is articulated to the corresponding main panel by a pre-marked transverse folding line ( 41, 42, 43, 44), characterized in that the end setting device is a bi-articulated device in which the end part of said at least two connecting tabs is attached to the corresponding end panel ( 61, 62, 63, 64) by a flexion zone with no pre-marked transverse folding line. • an end strip comprising the same number of end panels ( 61, 62, 63, 64) as the number of primary panels, successively articulated to one another around folding lines arranged aligned with folding lines of the main panels, the end strip being closed on itself to define a closed contour around an inner space of the packaging element in a transverse plane perpendicular to the longitudinal direction; • for at least two separate main panels, at least one longitudinal connecting tab that connects said main panel to a corresponding end panel, and the connecting tab of a main panel being separate from the connecting tab(s) of the other main panels, the connecting tabs being separated from one another transversely by a separating cutout in the sheet of material;