A blank including a single rectangular sheet of paperboard having opposed top and bottom edges and opposed left and right edges. The sheet has a midline spaced equally from the left and right edges, with a cut that extends from the top edge to a point spaced from the top edge, and a fold line that extends from the point to the bottom edge. The sheet also has a first zone that extends from midline to right edge along the bottom edge, a second zone that extends from bottom edge to a line spaced from the top edge along the right edge, a third zone that extends from midline to left edge along the bottom edge, and a fourth zone that extends from bottom edge to the line along the left edge. The first and second zones are configured to join the third and fourth zones.

A reusable mailer bag includes front, rear, first side, second side, and bottom panels which include interior surfaces that define a carrying volume that has an opening which is opposite the bottom panel. The mailer bag also includes a flap and a first side extension. The flap is configured to extend across the opening to close the carrying volume during shipping. The flap includes a first end portion that is attached to the rear panel and a second end portion that is configured to secure to the front panel. The first side extension extends from a first edge of the second end portion of the flap that is adjacent the first side panel. The first side extension is configured to extend around the first side panel and to secure to the rear panel when the second end portion is secured to the front panel.

A reusable mailer bag includes front, rear, first side, second side, and bottom panels which include interior surfaces that define a carrying volume that has an opening which is opposite the bottom panel. The mailer bag also includes a flap and a first side extension. The flap is configured to extend across the opening to close the carrying volume during shipping. The flap includes a first end portion that is attached to the rear panel and a second end portion that is configured to secure to the front panel. The first side extension extends from a first edge of the second end portion of the flap that is adjacent the first side panel. The first side extension is configured to extend around the first side panel and to secure to the rear panel when the second end portion is secured to the front panel.

A blank including a single rectangular sheet of paperboard having opposed top and bottom edges and opposed left and right edges. The sheet has a midline spaced equally from the left and right edges, with a cut that extends from the top edge to a point spaced from the top edge, and a fold line that extends from the point to the bottom edge. The sheet also has a first zone that extends from midline to right edge along the bottom edge, a second zone that extends from bottom edge to a line spaced from the top edge along the right edge, a third zone that extends from midline to left edge along the bottom edge, and a fourth zone that extends from bottom edge to the line along the left edge. The first and second zones are configured to join the third and fourth zones.

A reusable mailer bag includes front, rear, first side, second side, and bottom panels which include interior surfaces that define a carrying volume that has an opening which is opposite the bottom panel. The mailer bag also includes a flap and a first side extension. The flap is configured to extend across the opening to close the carrying volume during shipping. The flap includes a first end portion that is attached to the rear panel and a second end portion that is configured to secure to the front panel. The first side extension extends from a first edge of the second end portion of the flap that is adjacent the first side panel. The first side extension is configured to extend around the first side panel and to secure to the rear panel when the second end portion is secured to the front panel.

A reusable mailer bag includes front, rear, first side, second side, and bottom panels which include interior surfaces that define a carrying volume that has an opening which is opposite the bottom panel. The mailer bag also includes a flap and a first side extension. The flap is configured to extend across the opening to close the carrying volume during shipping. The flap includes a first end portion that is attached to the rear panel and a second end portion that is configured to secure to the front panel. The first side extension extends from a first edge of the second end portion of the flap that is adjacent the first side panel. The first side extension is configured to extend around the first side panel and to secure to the rear panel when the second end portion is secured to the front panel.

A shipping mailer includes a main body having a first wall and a second wall that are folded together and sealed along sealed side edge portions of the main body. The shipping mailer has a closed first end portion and a second end portion having an opening sealable by a closure. The main body is made of a single-face corrugated material including a liner layer and a fluted layer. The main body includes a center fold line at the closed first end portion from which the first and second walls extend. The fluted layer includes a plurality of flutes extending parallel to the center fold line, and flutes of the first wall nest with flutes of the second wall. The fluted layer includes a plurality of preformed longitudinal fold lines formed in the flutes, and the preformed longitudinal fold lines are offset inwardly from the sealed side edge portions.

A shipping mailer includes a main body having a first wall and a second wall that are folded together and sealed along sealed side edge portions of the main body. The shipping mailer has a closed first end portion and a second end portion having an opening sealable by a closure. The main body is made of a single-face corrugated material including a liner layer and a fluted layer. The main body includes a center fold line at the closed first end portion from which the first and second walls extend. The fluted layer includes a plurality of flutes extending parallel to the center fold line, and flutes of the first wall nest with flutes of the second wall. The fluted layer includes a plurality of preformed longitudinal fold lines formed in the flutes, and the preformed longitudinal fold lines are offset inwardly from the sealed side edge portions.

A shipping mailer has a first wall and a second wall that at least partially define an interior of the shipping mailer. The shipping mailer has a closed first end portion and a second end portion, the second end portion comprising an opening sealable by a closure. A plurality of corrugations are coupled to the first wall and to the second wall in the interior of the shipping mailer. The corrugations of the first wall and the corrugations of the second wall have respective preformed fold lines at the closed first end portion about which the first wall and the second wall are configured to fold when an object is inserted into the shipping mailer to create an end wall extending between the first and second walls at the closed first end portion of the shipping mailer.

A shipping mailer has a first wall and a second wall that at least partially define an interior of the shipping mailer. The shipping mailer has a closed first end portion and a second end portion, the second end portion comprising an opening sealable by a closure. A plurality of corrugations are coupled to the first wall and to the second wall in the interior of the shipping mailer. The corrugations of the first wall and the corrugations of the second wall have respective preformed fold lines at the closed first end portion about which the first wall and the second wall are configured to fold when an object is inserted into the shipping mailer to create an end wall extending between the first and second walls at the closed first end portion of the shipping mailer.