Dysfunctional Rules X: I Cast Comprehend Rules

[Jervis]

That's incorrect: Forgotten Realms Campaign Setting allowed it; no such permission in the Player's Guide to Faerûn...


It's arguable: according to the Anthrowhale,

Obviously, the same thing could be said about the Jotunbrud feat...


That's questionable - not just because of Grapple size limitations, but because you don't lose your feat-granted benefits while being magically reduced in size - would it be RAW for creature under the Minute Form effect to swallow something Tiny-, Small-, or even Medium-sized?
The similar, but closer to RAW case is - some monsters have Swallow Whole which lists exact sizes which it can swallow - such as Legendary Shark:

Ah right, I mixed my Fearun books up. As for grappling itself, I’ve seen it argued both ways. One where you automatically fail the check if the size categories don’t mesh up and one where you can’t make the check at all if the sizes don’t mesh up. As for Swallow Whole I remembered it existing as feat it some book though I may be mistaken.

Regardless I think the counting as 3 size categories alone is funny enough to mention.