We had to do a little research on this. This is what we found:
"A Japanese singing bowl, or "orin", is a traditional Buddhist instrument used for meditation and prayer, characterized by its minimalist design, pure, long-lasting sound, and use in Zen Buddhist practices. Unlike the more complex Tibetan singing bowls, orin are typically struck on the rim with a mallet or a striker to produce a single, pure tone with a profound, calming resonance that helps promote relaxation and mindfulness. "
 
Height: 7cm
Width at base: 13cm
 
A lovely little, unusual piece.
These are vintage and imperfect.