Musical instrument: Kalimba I have it displayed as interior decoration and don't use it as a musical instrument. To tune it, you loosen the screws a bit and adjust the keys up, down, or sideways. It can produce a one-octave scale. Size: 20cm tall, 14cm wide (at the widest point), and a little over 1cm thick. It's a used item, so please only purchase if you don't mind.