I love making Runes with Herbs, and this set has such a mellow feel to them. This set is made of clay mixed with Lavender. Lavender helps one to connect to the psychic plane and to travel to get their information in a relaxed way. Its a very powerful herb. The essence of each Rune is invoked in their creation, and I asked the Lavender if it would like to be of assistance with these Runes. Each Rune is the size of a quarter and approximately twice as thick. I am also a Reiki practioner, and use Reiki in their making. Included with each set is a booklet on how to get the Runes to start "singing" to you.