User blog comment:JAlbor/Wikia at E3 2012/@comment-5088097-20120531170022/@comment-4868246-20120615222501

I noticed that Ezio was in fact taller than all NPC's except Mario (who is slightly taller) and mercenaries, and for Ezio's allies (La Volpe, Machievelli, Da Vinci.. etc) where almost the same as Ezio's hieght, the rest of the people in the game are clearly shorter than Ezio.

Moreover, I heard that Altair was 0.2 foot taller than Ezio, however I wish the hieght differences would be much more diverse in AC3 especially because it takes more effort rather than skinning every character differently :D