Product review (5 stars): good product & price
They fit!  I can keep using my enviracare humidifier without troubles as long as these stick around.  I got a 3 pack to swap out filters as needed.  I haven't noticed any problems.  The filters come flat, which is nice for storage of extra, and there was no problem rounding them out and fitting them in.  There was a moment where it seemed too tall, but it settled in no problem.