A container made from corrugated paperboard has a bottom wall, opposite side and end walls, and a self locking arrangement on the end walls holding the container in erected condition. The self locking arrangement includes first and second end panels on opposite ends of the side walls, and a third end panel on opposite ends of the bottom wall. The end panels form the end walls of the container. The first and second end panels have at least one notch formed in an upper edge, and a roll over flap is foldably joined by at least one web to an upper edge of each of the third end panels and is folded inwardly and downwardly over the upper edges of the first and second end panels into a locked position to hold the end panels and thus the container in erected condition. In the locked position, the web is engaged in the notch. In particular, the web has a thickness less than the thickness of an end panel, so that it fits deeply into the notch, producing a tight fit and reliable interlocking of the components of the self locking arrangement.