High quality round cotton refill pads for aromatherapy pendants or other diffusers. These 25mm diameter pads (about the size of a quarter) can fit in any scent chamber that is 1″ or larger. Can often be pressed into smaller chambers as well. Just add a few drops of your favorite essential oils and enjoy that scent throughout the day. Whether you’re looking for calming, healing, or uplifting scents – you choose the oil. Works with perfumes as well. Simply grab a new pad when you’re ready for a new scent. With 25 pads, this pack will allow you to experience a variety of scents or use the same scent for a quite a long time.