Bigger by the hour, staying put, and with nowhere anyone can account for them to go.
The clones gathered at Station 24 are still growing. By all accounts they are not ranging far from the platform, which is precisely what bothers Carl: if there are that many of them and they get larger by the moment, they must be going somewhere. Set against Mordecai's explanation of the floor as a cartoon about the Krakaren absorbing the universe, Carl concludes they are meant to be the final blow — the exclamation point on the political point the floor is making.
Small-dog-sized now and still swelling, packed shoulder to shoulder across a platform.
The floor's growing swarm, and the presumed instrument of its endgame.