Review on Affordable 40-Piece Humidifier Filter Refill Sticks for Personal USB-Powered Humidifiers - Perfect for Office, Home, and Bedroom Use, 2 Sizes Available by Tracy Smith

I was disappointed when I tried to use the filter, in fact I cursed! I went on a search to see what I had done wrong. The required size was not documented by my humidifier, so further research is needed. The bottom line is that you can cut the longer ones and use two pieces to create a proper size out of the smaller ones. There are other brands with sizes on offer but for now these will solve my problem. TIP: Measure your filter before ordering. Stupid Revane showed me this product as the one I usually buy with my moisturizer. DON'T BELIEVE!