"Thumbelina" is a show tune from the 1952 film Hans Christian Andersen written by American songwriter Frank Loesser and performed by Danny Kaye.

[3] The song is based on the titular character of Danish fairy tale Thumbelina, who is the size of a thumb.

In the song, a morose Thumbelina is encouraged to sing and dance ("Thumbelina dance, Thumbelina sing") despite being a "tiny little thing", and when her "heart is full of love" she becomes "nine feet tall".

Loesser never gave himself much credit for this song, although the song was created in a way it was meant to be – A "little ditty" that is aimed to entertain a young child.

[2] The song is written in the key of D major with a tempo of 100 beats per minute (although the tempo in the actual record plays at 132 BPM).