Reach For The Stars

I'll grant you that Galactus was always mammoth, in comparison to humanoids--

...but he was drawn to be about the size of the Watcher, right?

And at times, liberties have been taken with his height.

For instance, he's certainly since outgrown the roof of the Baxter Building:

But when did he shoot up to stand toe-to-toe with Celestials?

Because, seriously?
Someone who can step on Manhattan isn't going to let a little thing like the FF stop him next time.