Twenty-one Note Pianowood Kalimba. This instrument has four extra low notes compared with the Seventeen note style. The case is made from poplar, sourced as usual, from an antique piano cabinet. Likewise, the spruce soundboard has amplified music for over 100 years in its previous life as a piano. The case is 7.25″ in diameter. The body of the Kalimba is 1.5″ tall. With the lid in place, it 2.5″ in height. The lid fits snugly for protection. Clear lacquer finish.