An electronic apparatus for use in selecting a patient interface device and including a geometric fit score determining unit (42) configured to calculate a geometric fit score for each of one or more of patient interface devices, a patient criteria fit score determining unit (44) configured to calculate a patient criteria fit score for each of the one or more patient interface devices, and an overall fit score determining unit (46) configured to calculate an overall fit score for each of the one or more patient interface devices based on the calculated geometric fit score and the calculated patient criteria fit score for each of the one or more patient interface devices.