An apparatus to print on media moved along a media path , comprising: a first print head die having first print structures (402A-402D) disposed along a major dimension thereof perpendicular to the media path , the first print structures (402A-402D) including a leading print structure with respect to the media path ; and a second print head die independent of the first print head die, the second print head die having second print structures (404A-404D) disposed along a major dimension thereof perpendicular to the media path , the second print head die being staggered with respect to the first print head die along the media path , the second print structures (404A-404D) including a leading print structure with respect to the media path ; wherein a portion of the second print structures (404A-404D) overlap a portion of the first print structures (402A-402D) by an extent between a minimum value and a linear function of a separation between the respective leading print structures of the first and second print head dies , wherein the first and second print structures (402A-402D, 404A-404D) provide nozzles and liquid firing actuators for ejecting printing liquid onto a print medium, characterised in that the linear function is in the form of bx + c, where x is the separation between respective leading print structures of the first and second print head dies in the direction of the media path, b is a positive real number, and c is the minimum value, wherein the minimum value is equal to a die placement variation empirically determined from a manufacturing process used to place the first and second print head dies . a first print head die having first print structures (402A-402D) disposed along a major dimension thereof perpendicular to the media path , the first print structures (402A-402D) including a leading print structure with respect to the media path ; and a second print head die independent of the first print head die, the second print head die having second print structures (404A-404D) disposed along a major dimension thereof perpendicular to the media path , the second print head die being staggered with respect to the first print head die along the media path , the second print structures (404A-404D) including a leading print structure with respect to the media path ; wherein a portion of the second print structures (404A-404D) overlap a portion of the first print structures (402A-402D) by an extent between a minimum value and a linear function of a separation between the respective leading print structures of the first and second print head dies , wherein the first and second print structures (402A-402D, 404A-404D) provide nozzles and liquid firing actuators for ejecting printing liquid onto a print medium, characterised in that the linear function is in the form of bx + c, where x is the separation between respective leading print structures of the first and second print head dies in the direction of the media path, b is a positive real number, and c is the minimum value, wherein the minimum value is equal to a die placement variation empirically determined from a manufacturing process used to place the first and second print head dies . <EOS>