Dive deep into the healing power of sound: set of 7 large crystal singing bowls The following is an overview of the sizes, keys and qualities of the crystal singing bowls in this set. It is assumed that each key is connected to one of the seven main chakras. The sound of the corresponding crystal singing bowl should have an effect on the respective chakra. 432Hz crystal singing bowl approx. 20.5 cm (crown chakra, tone B) 432Hz crystal singing bowl approx. 22.5cm (forehead chakra, tone A) 432Hz crystal singing bowl approx. 25.5 cm (throat chakra, tone G) Crystal singing bowl 432 Hz approx. 28 cm (heart chakra, tone F) 432Hz crystal singing bowl approx.