Mr. Kaplan says on 25/Dec/10
He was bigger than 6'3" Fred MacMurray. 6'4", I buy.

Shadow2 says on 25/Dec/10
Gavin was probably 6'3.5", 6'4" in shoes. He would have had a good acting career but left to do other important things, including becoming a diplomat. He always reminded me of two other tall actors, 6'3" Tom Tryon, and Stuart Damon who was close to 6'3" during his "Champions" period.

Shaun says on 10/Dec/10
OK Eastwood looks 6'3.5" in that photo, the other actor is standing at an angle so he looks taller.