So what’s happening here is that a normal-sized or mini-giantess girl is crushing a small girl with relatively gigantic boobs between her own gigantic boobs. The small girl is doing the same to a tiny girl, and the tiny girl is doing the same to a minuscule man. So basically, it’s a triple breast crush, with three people enveloped in the breasts of the giantess!
If you click on the image, you’ll get to see a full-sized version of it, which shows a lot more detail of the tiny people getting swallowed up and crushed by cleavage!