The term "tundra" refers to a type of biome, a cold and treeless environment, and wolves are a type of animal, specifically a large canid. Wolves can live in various environments, including tundra, but they are not a distinct species or breed specifically called "tundra wolves".
Instead, the wolves you see in tundra areas are likely:
* Grey Wolves (Canis lupus): These are the most common wolf species and can be found in various environments, including tundras. Their size can vary depending on the location and individual, but typically they are large, weighing 70-175 pounds.
So, to answer your question, the size of a wolf living in a tundra is similar to the size of any other grey wolf.