I've seen wolves in the wild that I would estimate topped 150lbs. (No scales handy) I saw one watching my dog team sleep that, when sitting down, had a head even with my chest. I'm 5'11", so figure eyes 4"6" off the ground or so. Wolves are, by and large, much larger then dogs. I know that wild wolves are somewhat hard to find, but if you see them in the wild, you'll never confuse them with a large dog.
That said those Canadian wolves are pretty damn big.