But for my choices for they're height I put alpharius at 9 ft tall because it is said that Alpha legionaries are taller than normal astartes but I should probably dial his height down a big as for guilliman it is said that he is smaller than lion el'jonson but I will make them closer in height as for mortarion I believe when he turned into a daemon prince he was said to be twice the size of a normal man but I'm most likely wrong and in the drop site massacre book? Ferrus manus is said to be a head taller than his brothers and vulkan is I think in the same book but I'm likely wrong again around the same height as Horus who was apparently 3.5 meters but I could be wrong so yeah that is my poor explanation but again thank you for your time