Size: Our rectangle aroma pads size about 7x4.5x0.3cm/ 2.8x1.8x0.12inch, are suitable for humidifiers, air purifiers, essential oil diffusers, electronic aroma device, plug-in diffusers, waterless nebulizing diffusers. You can cut them to fit a or double them up (meaning side by side) if you need them bigger.Aromatherapy Diffuser: When placing the replacement humidifier pads in your diffuser, the diffuser will then be able to release an aroma of any scent of your choice. These scent refills help to create the nice atmosphere.Enough Quantities: You will get 50 pieces humidifier aroma pads for essential oils in the package, which are sufficient to meet your ordinary use and replacement; It is recommended to change the aromatherapy scent pads refer to your using frequency.Pad Replacement: It is recommended to replace every month or when switching between essential oils in your diffuser or noticing an odor or discoloration of the pad; Using an old pad lowers your diffuser efficiency.Application Scene: You can place it on your car by using with lockets. Applicable on bedroom, living room, meeting room, bathroom, office, massage parlor, library, store, hotel and much more. You can take the essential oil pads for humidifier with you easily, can provide you for a long time.