A single-handed quick closure comprising a first base member extending areally in a main plane of extent and having a first latch element and a first closure element; a second base member extending areally in a second main plane of extent having a second latch element and a second closure element; wherein the first and second latch elements (21, 31) are configured such that they are connectable or connected to one another while forming a connection of the first and second base members (2, 3) with form fit in at least one direction as a latch connection, and wherein the first and second closure elements (22, 32) are configured such that they are connectable or connected to one another while forming a closure to fix the first base member to the second base member in at least one direction not fixed in a form fit manner by the latch connection; and wherein the one of the closure elements is formed as an elevated portion and the other one of the closure elements is formed as a cutout of one of the base bodies (2, 3) such that the elevated portion engages into the cutout to form the closure, characterized in that the thickness of the base member including the cutout determined perpendicular to its main plane of extent outwardly spaced apart from the cutout is reduced to zero at least sectionally along the inner peripheral margin of the cutout; and in that the elevated portion has a tongue or groove that at least sectionally runs around the elevated portion substantially in a plane in parallel with the first main plane of extent of the base member having the elevated portion and spaced apart from the free end of the elevated portion; and in that the cutout has a groove or tongue along its inner peripheral margin formed in a complementary manner to the tongue or groove in the elevated portion such that the groove and tongue (43, 44) mesh flush with one another in the closed state. a first base member extending areally in a main plane of extent and having a first latch element and a first closure element; a second base member extending areally in a second main plane of extent having a second latch element and a second closure element; wherein the first and second latch elements (21, 31) are configured such that they are connectable or connected to one another while forming a connection of the first and second base members (2, 3) with form fit in at least one direction as a latch connection, and wherein the first and second closure elements (22, 32) are configured such that they are connectable or connected to one another while forming a closure to fix the first base member to the second base member in at least one direction not fixed in a form fit manner by the latch connection; and wherein the one of the closure elements is formed as an elevated portion and the other one of the closure elements is formed as a cutout of one of the base bodies (2, 3) such that the elevated portion engages into the cutout to form the closure, characterized in that the thickness of the base member including the cutout determined perpendicular to its main plane of extent outwardly spaced apart from the cutout is reduced to zero at least sectionally along the inner peripheral margin of the cutout; and in that the elevated portion has a tongue or groove that at least sectionally runs around the elevated portion substantially in a plane in parallel with the first main plane of extent of the base member having the elevated portion and spaced apart from the free end of the elevated portion; and in that the cutout has a groove or tongue along its inner peripheral margin formed in a complementary manner to the tongue or groove in the elevated portion such that the groove and tongue (43, 44) mesh flush with one another in the closed state.