Weight:
* Average: 40-175 pounds (18-79 kilograms)
* Smallest: Arctic wolf (40-100 pounds)
* Largest: Gray wolf (60-175 pounds)
Length:
* Head-to-tail: 4-7 feet (1.2-2.1 meters)
* Shoulder height: 2-3 feet (0.6-0.9 meters)
Factors influencing size:
* Subspecies: Different wolf subspecies have different average sizes.
* Location: Wolves in colder climates tend to be larger than those in warmer climates.
* Sex: Males are typically larger than females.
* Diet: Wolves with abundant food resources tend to be larger.
* Individual variation: Like all animals, individual wolves can vary in size.
It's important to note that these are just general ranges, and individual wolves can vary significantly in weight and length.