I've seen the pic. But I'd like a source besides ADI because honestly, they're FUBARS and they added A LOT of stupid ish with their 2 garbage movies. In Alien.. because of the height of the actor the Alien was large. But in Aliens they didn't have any huge actor as any of the Aliens. So you can clearly see in that film that the Aliens aren't much bigger than the Marines or even Ripley for that matter. Because they weren't.
And I think someone, ANYONE in that film would've made the comment about 8"+ tall creatures. No one does.
Well, I think I should throw the fact out there that mixed media are used to portray the aliens, so using the stunt actors alone to gauge the height off of isn't fair.
From the 2nd movie (ALIENS) to the last piece of poo known as AVP:R, everything from animatronics, to CGI were used. In those cases, the height of the creatures varied accordingly. Thus, making what the actors say to be the only hard evidence we have.
Take this for example: When Burk tries to flee from both the ALIENS and the Marines, he comes face to "chest" with an alien. The reason for me using the word "chest" is because he clearly has to look us at the alien. In addition, the alien strikes downward. Indicating that the alien is taller in that scene.
Now, the reason I said we never get to see an alien "standing up tall" is because some aliens are double-jointed. In the cast of alien 3 for example, they didn't use stilts on the actor, so this fact already will lead to the inconsistencies you see. Please view the following pix:
See what I mean when it comes to the lower part of the legs?
Ok, using that logic then explain how the Alien in part III was just like a normal Alien in size when it spawned from a little Dog!? I know that scene conflicts with the extended cut with the Alien spawning from an ox but the version released in theatres with the Alien spawning from a dog is canon. If you say an Alien spawned from an elephant would be as big as an elephant then an Alien spawned from a dog should therefore be about as big as a dog. Correct? But you can see in part III it isn't.
Ummm, maybe you haven't seen rottweilers in person? Those are far from being "little dogs". If you stand a rottweiler on it's hind legs, they're even taller than some people.
Furthermore, the original script used the OX as the host (as you mentioned above), so with the low production budget, they could not go back and redesign the alien. Meaning, the dog alien is in fact a bull alien. 
Plus, to think that means you also think an Alien spawned from an elephant would be bigger than a Queen. I'm not buying it.
Well, this doesn't sit well with you. I fully acknowledge and respect your opinion. But please bear with me on this: the fact that it doesn't sit well with you doesn't mean that it's not true. So, if it was possible for an elephant to be host to an alien, then YES.... the alien should be bigger than the Queen. Here's why I say this: In ALIEN (the 1st movie) we get to find out that the Space jockey had fallen victim to a facehugger. It's ribs were bent outwards, indicating that the alien had completed it's gestation period, and burst out of it's chest. Did you see the SIZE of that hole!? That's no normal sized alien.
And as far as the Predalien: Garbage. That's one of the stupid things I was talking about with ADI. It's half Alien, Half Predator. Yet it looks more like it's host (Predator) than any other previous Alien AND it's also a quasi-Queen that can lay eggs. Orally.
