Blank for a tubular carton

An elongate blank for forming a tubular carton, said blank comprising a plurality of panels arranged in a row along a length of the blank, said panels being hingedly connected one to another in series, each of said panels having a pair of opposed free end edges disposed generally along the length of the blank, said each panel being formed along either free end edge thereof with a cutout so that said blank is provided along either longitudinal edge thereof with a plurality of tabs each interposed between adjacent ones of said cutouts, said cutouts being dimensioned and configured such that said tabs have an identical size and configuration and are complementary to at least some of said cutouts, at least one of said tabs comprising an end retention structure for preventing contents of the carton from dislodging from the carton when said blank is erected into the carton, wherein said at least one tab is disposed astride a panel fold line along which two adjacent ones of said panels are hingedly connected, wherein said at least one tab comprises an anchoring portion hingedly connected to one of said two adjacent panels to be folded into face contacting relationship with said one adjacent panel, a gusset portion hingedly connected to said anchoring portion, and a web portion hingedly connected to said gusset portion, said web portion being connected to the other of said two adjacent panels to be in a folded position for engagement with a content of the carton.