I was given a Quattro Air with an L size printed on the bag, but I had significant leaking and was taking it off at night. It seemed to be pressing on the upper nasal area. I went in for a refitting and was given the AirFit F10 but now in the M size. It's a little wider in upper nasal area but feels a little small on my face. According to the template I am slightly more medium than large.
My fitter does not do returns on masks so I now have both masks. Can size adjustments be made simply by changing the cushion? (Headgear size is fine in my case).