Hohner Little Lady Mini Harmonica (M91560)
[The photo may be different than the current model shipping. Hohner changes the cover plate look from time to time, but the insides remain the same and it plays the same.]Billed as The World's Smallest Harmonica, the Little Lady is tuned like holes 4-7 on a regular diatonic harmonica. Comes in a hard plastic case so you can keep it clean in your pocket. 4 holes, 8 reeds, classic wood comb, 1 3/8 inches in length.