as replied to on another forum, *all* cpap masks/hoses have a nominal 22mm connection size, there are no adapters available or needed.
the end of your wife's climateline hose has gotten soft and lost some of it's grip.
some people will tell you to throw it away and get a new one. I'm not one of those people.
connect the mask and hose, then wrap a rubber band around the end, or some stretchy (silicone) tape, or do what I did with one of my regular hoses which had an end that got soft after a couple years of use, I wrapped thread around the end tightly, it gave the end grip again, and I used the hose for a couple more years until I replaced it with a longer one. (waste not want not, etc)
It appears that the climate line hose end has been stretched some by the mask adapter that has been in it for a year or so. I tried the short hose in an older heated climate line hose that hasn't been used much because it did not have a oxygen hose connection feature and it fit pretty snugly.
Hi Clay L,
I tried the Amara View for a few days with my ClimateLine hose and didn’t have any trouble with getting that mask to fit into it.
Good luck to you with getting this problem straightened out.