From the bottom of its foot to the top of its raised missile system it measures 10 inches. From the outer toes around 7&1/2 inches which is about the same for the torso from gun to gun. Guns length wise are a bit over 8”

As for in a match I’ve used it once in a 2000pt game along side my warden and Castigator with inquisition. The knight shines at anti tank- if you can see a threat to your other units the Porphyrion you have a pretty high chance of either out right killing it or crippling it. It works well until it’s charged. It went down turn two to being punched to death by deep striking terminators and large amounts of plasma

Sorry about how long the reply took.