The Product Categories on this page group the wind chimes by their lowest bottom pitch or tone. A4 is the lowest pitch I offer, representing the note A in the fourth octave. G5 is the highest note in this series. The first category includes wind chimes of the lowest overall tone. The subsequent categories progress from lowest to highest bottom pitch. Because the pitch is determined by the length of the tube, and the pitch lowers with increasing length, then the total length of the wind chime will vary according to the lowest pitch. Thus I include the total hanging length with the pitch in measure of inches.