Explore our 20 inch frosted crystal singing bowls. 18-22 inch bowls are truly large and heavy bowls. These play incredibly loud and powerfully, and one needs to be careful to not play the bowls too loudly to hurt someone's ears. The vibration from these bowls completely fills the background of a room with noise, and the vibration is easily felt in your body as you play. In these sizes all the notes are in the 3rd octave.