Passenger personal units

A plurality of personal units for aircraft passengers is provided. Each personal unit is arranged to define a longitudinal axis. The personal units are arranged to form first and second columns along a floor to define respective first and second column axes, the personal units in each column being arranged side-by-side in a longitudinally offset relationship at an acute angle to the respective column axis. Each personal unit is arranged to define a personal space for accommodating a person in a seated position and accommodating the person in a recumbent position. At least some of the personal units are arranged such that a portion of the personal space of the respective personal unit is arranged in a stacked relationship, in a direction perpendicular to the floor, with respect to a portion of the personal space of a personal unit in the respective other column.