I'm not sure how tall he was, but if you look at the inner photos of the Derek & The Dominos Layla album, you'll see a photo of Duane standing next to Eric Clapton, who is about 5'10", and Duane appears 2-3 inches taller than Eric, so that would make him about 6' or 6'1", unless he was standing on a slightly elevated floor! Greg Allman is 6'1", so I'm guessing Duane was around that height as well.
US musician Gregory "Gregg" Allman was 69 years old when he died on May 27, 2017 (birthdate: December 8, 1947).
Melvin Gregg is 6' 2".
Greg Allan Martin is 6'.
5-11
Meli Alexander is 5' 5".
Jeffrey Davies is 5' 5 1/2".
Forrest Gregg was born on October 18, 1933.
Melvin Belli's birth name is Melvin Moulon Belli.
Gregg Sulkin is a boy.
Mekenna Melvin is 5'.
Gregg Burton is 6'.
Gregg Nourjian is 6'.
Kelly Gregg is 6'.
Melvin Lima is 6' 1".
Melvin Shine is 183 cm.
Melvin Turpin is 6' 11".
Melvin Dillon is 5' 11".
Melvin Butler is 6' 4".
Melvin Cabrera is 5' 9".
Melvin Wong is 5' 11".
Allan Melvin is 5' 11".