Each block is 3 times as long as it is wide, and slightly smaller in height than in width. The blocks are stacked in a tower formation; each story is three blocks placed adjacent to each other along their long side, and each story is placed perpendicular to the previous (so, for example, if the blocks in the first story are pointing north-south, the second story blocks will point east-west). There are therefore 18 stories to the Jenga tower. Since stacking the blocks neatly can be tedious, a plastic loading tray is included.
Once the tower is built, the person who built the tower moves first. Moving in Jenga consists of taking one and only one block from any story except the completed top story of the tower at the time of the turn, and placing it on the topmost story in order to complete it. Only one hand at a time may be used to remove a block; both hands can be used, but only one hand may be on the tower at a time