In the key of C major. The Hohner Little Lady is the smallest harmonica in the World. It is fully playable and was the first instrument to be played in outer space in 1965. The Little Lady was made worldwide famous in 1965 when Walter Schirra, commander of the Gemini 6 manned space flight mission, used one to play "Jingle Bells" for his team at Ground Control. With an overall length of only 3.5 cm (1.38 inches), it is the smallest playable series manufactured harmonica in the world and shares the same high technical standards as its larger siblings.