Product review (1 stars): Wrong size, bad materials, total waste of money.
The way this style humdifier works is by pulling air through the wet filter and blowing it out to the room. If the air doesn't get pulled through the filter, no moisture makes it to the room. The filter must be sitting in the water in the tray, and must make contact with the bottom of the fan so the only route for the air is through the filter.
These filters are a bit short. So they don't touch the bottom of the fan. So the air just cruises right over the top and dries out the filter in the process. In the meantime you still have a room with 25% humidity because all your humidifier is doing is blowing dry room air out the top.
I'm ordering Holmes filters from now on.