Abstract: A closure for one end of a carton having four walls has a first pair of opposed flaps extending from two of the walls. Each flap of the first pair of flaps has a generally triangular portion. A second pair of opposed flaps extend from the other two of the walls and are connected to the first pair of flaps for thereby providing an endless series of flaps. One of the flaps of the first pair has a height exceeding the height of the other of the first pair. The flaps of the second pair gradually increase in height whereby folding of the first pair of flaps followed by folding of the second pair of flaps causes the flaps to be disposed below the plane of the carton bottom for thereby being maintained in a snap locking engagement.