how big can humans get? Physical limitations where size drives weight beyond limits of muscle strength? R. Wadlow is supposedly the tallest human recorded alive, at 8ft 11.1in. I'm looking for compressive strength limits for bone, and calculated or estimated limits on pulling power of muscle, combining to make a theoretical limit. Preliminary calculations assuming a six foot, 200 pound weightlifter able to lift 300 pounds, indicate a proportional 15 footer might not be strong enough to stand.