A nozzle for use in an air cycle machine has a plate. A plurality of vanes extends in a second axial direction away from the plate. The plurality of vanes extends for a height away from the plate and a width defined as the closest distance between two adjacent vanes, with a ratio of the nozzle height to the nozzle width being between 0.3563 and 0.4051. An air cycle machine and a method are also disclosed.