The description of what his voice probably should have sounded is really amusing to Filbo. Wow. He can't imagine himself with a deep voice -- he always had a higher-pitched one his entire life.

"I see! Wow, I really wonder how you think the taller ones would sound. I'm just a little below average in height"

Far taller, and with mouths just as wide as his, or perhaps a little more to accomodate tusks. Grumpuses from seven all the way to eight feet tall aren't extraordinary, too, they're just considered tall.

Filbo has a question, though...

"But what's...this Cookie Monster, exactly?"