The pillows...better known as herb pillows!! They are made small enough to go under your bed pillow. They really aren't pillows. You can make it as plain or fancy as you want it to be. And as small or larger. Just remember, the bigger it is, the more herbs you'll need. Some herbs to use are chamomile, valerian, skullcap, and lavender. I've also heard that catnip can be used, but I haven't tried it. You can use a mixture of the dried herbs and oils. Or you can mix the oils to get the scent strength you want, soak it in the fabric and let it dry. Just remember to keep it slightly scented. You don't want to keep yourself away because it's so strong smelling!! Some people even use eye masks this way. Instead of putting it under your pillow, you cover your eyes with it to help keep the light out.
If you want you can use just one of the herbs above. Lavender seems to be pretty popular. You can use fresh or dried lavender. And you can keep the scent active with lavender oil. If you don't have an herb shop in your area, maybe you have a Hobby Lobby? In the candles and soap section, they sell both the lavender oil and herbs. If you have to get it online, I recommend these sellers on Ebay. I use them all the time and their products are great! sun_pure_botanicals sells awesome oils at cheap prices. athenas_garden sells great herbs at great prices.