Alaska Yukon moose size: Bulls weigh 1,200–1,600 lbs, cows weigh 800–1,300 lbs, stand up to 6–7 feet tall at the shoulder, and carry antlers spanning 55–75 inches wide. The Alaska Yukon moose is the biggest moose on Earth. It is also the largest member of the deer family, period. It is also known for its ...