A printable substrate comprising a printable board including a front surface defined by a first side edge; an opposite second side edge; a third side edge including first and second ends, wherein the first and second side edges intersect the first and second ends of the third side edge at first and second points, respectively; and a fourth side edge opposite of the third side edge, wherein the fourth side edge includes first and second ends, wherein the first and second side edges intersect the first and second ends of the fourth side edge at third and fourth points, respectively. The printable board including a border having an outer peripheral edge removably coupled to the first, second, third, and fourth side edges using perforations, and an extended perforation portion extending a distance from the first point, into the border, toward the outer peripheral edge, without reaching the outer peripheral edge.