Quote Originally Posted by eggynack View Post
I'm more inclined to think that it's in Greg's mind, especially because his image of the gems would be defined by how they are now. I also like the theory that their form is malleable along the size axis in addition to in terms of appearance, and that they scaled up after they shifted roles to Steven's mothers.
Eh, I'm not sure.

While Flashback Greg is shown with roughly the same proportions as Steven, he's a fully grown adult in the flashback, so he's going to be considerably taller than Steven is. I have not made a height chart or anything, but I think the Gem's size in the flashback is roughly consistant with their sizes compared to Greg in the rest of the show.