A flexible package comprising: a top surface, a bottom surface spaced from the top surface, and at least one side wall (112, 118, 116, 118); the top surface and the bottom surface each being connected to the at least one side wall (112, 114, 116, 118) such that the top surface, the bottom surface and the at least one side wall together define an interior volume of the package for containing at least one article therein, said top surface having a length, a width, and a peripheral edge defined at least in part by the connection of the top surface to the at least one side wall (122, 144, 116, 118), a portion of the at least one side wall extending outward beyond the connection of the top surface to the at least one side wall (112, 114, 116, 118) and having a free edge spaced from said connection of the top surface to said at least one side wall; an opening device attached to the top surface of the package; and a closure system operable on said portion of the at least one side wall (112, 114, 116, 118); wherein said opening device is at least in part detachable from the top surface to provide access to the interior volume of the package, and said closure system is operable on said portion of the at least one side wall to permit selective closing and opening of the package following detachment of the opening device from the top surface of the package; and characterised in said opening device having a width at a widest point along the length of the opening device which is between 40% and 90% of the width of the top surface and a length at a longest point along the width of the opening device which is between 40% and 90% of the length of the top surface. a top surface, a bottom surface spaced from the top surface, and at least one side wall (112, 118, 116, 118); the top surface and the bottom surface each being connected to the at least one side wall (112, 114, 116, 118) such that the top surface, the bottom surface and the at least one side wall together define an interior volume of the package for containing at least one article therein, said top surface having a length, a width, and a peripheral edge defined at least in part by the connection of the top surface to the at least one side wall (122, 144, 116, 118), a portion of the at least one side wall extending outward beyond the connection of the top surface to the at least one side wall (112, 114, 116, 118) and having a free edge spaced from said connection of the top surface to said at least one side wall; an opening device attached to the top surface of the package; and a closure system operable on said portion of the at least one side wall (112, 114, 116, 118); wherein said opening device is at least in part detachable from the top surface to provide access to the interior volume of the package, and said closure system is operable on said portion of the at least one side wall to permit selective closing and opening of the package following detachment of the opening device from the top surface of the package; and characterised in said opening device having a width at a widest point along the length of the opening device which is between 40% and 90% of the width of the top surface and a length at a longest point along the width of the opening device which is between 40% and 90% of the length of the top surface.