C5 or C#5 depending on the exact set.  Thadobati singing bowl under 5 inches across.  Additional singing bowl to complete a chakra set with the first note in the next octave.  Bowl 8 in a 7 note set, bowl 13 in a 12 note set. This bowl was selected at the time the set was assembled so that it matches the original seven bowls.

About the photos:

Photo is an example, actual bowl will be its own individual.