Grinch wearing clothes, not naked after all...
Did anyone else notice that the Grinch is actually wearing a one piece body suit with shoes? You'll notice his neck collar which separates his suit from his skin. And if you look at the book's illustrations you'll notice one where he has his hands in his pockets across his abdomen. Also notice how most of the Who's are wearing similar body suits, only their's are different colors from their skin.
And that's one more detail the dreadful live action remake got wrong, where they have Jim Carrey Grinch appear as a clothes-less green cat-like creature.
In the book and in the animated film the Grinch is a variation of a Who and not an anthrpomorphic feline like the Cat in the Hat.