This teal whales headband is a beautiful celebration of the humpback! Did you know that fully grown humpback whale males are slightly smaller (43 to 46 feet) than females (49 to 52 feet)? Also, newborn humpback calves are about the length of their mother's head. At birth, calves are about 20 feet long and weigh up to 2,000 pounds. Graceful, beautiful, and strong, the humpback whale is a favorite to see in Alaskan waters.