Hall's largest flute produces deep and beautiful mellow tones. This flute is highly recommended for the adult professional and novice players alike. The D flute is the easiest to play providing the finger holes can be sealed properly. The larger embouchure hole requires less air. The D flute's tone is deeper and mellower than the smaller flutes. 2 1/2 octave range; Length: 21.8 inches – 553mm x 22mm, Offset keys; Design: Lily.