This huge wolf type beast is ABSOLUTELY MASSIVE AND LONG!
I read about this beast in the book I ordered ( It's American, because it has " color " in it. )
Here are some facts I know about him:
As Fenrir grew ever larger, he could straddle mountains and span lakes with his huge legs, and as he roamed in search of food, the ground trembled at each footstep.
Finally, Fenrir's mouth grew so big, that his bottom jaw touched the ground, his upper jaw scraped the heavens. At the end of the world he will bite a chunk from the moon, leaving a huge crescent hanging in the sky.
Fenrir was so strong that he could break any chains that were put on him to try and keep him restrained.
His height doesn't say, but it says he is 6 miles long ( 10km )