The medium DreamWear frame and headgear fit me out of the box since my head is a pretty average size. I haven't been tempted to mess with that.
However, I learned last night that I can use either the small or the medium DreamWear Full Face cushion.
With the Amara View, the template had me as a medium, but neither the small nor the medium fit me correctly.
With the DreamWear full face template, my nose is clearly in the small range... it doesn't come close to the line for medium.
So, for the first two weeks, I used the small DreamWear insert and was overall very pleased.
But, of course, I had to try the medium for comparison.
I was surprised to find out that the medium cushion does not leak either, and it is even more comfortable than the small.
Plus, I feel like I get more air through my nose with it. So, even though the sizing guide measures me as a small,
there's a good chance that I'll stick with medium.