For bears, height is usually measured at the shoulder when the animal is on all fours, according to Polar Bear International. On average, polar bears on all fours are 3.5 to 5 feet (1 to 1.5 meters) tall, but when standing on its hind legs, an adult male polar bear may reach more than 10 feet (3 m). Lengthwise, they are 7.25 to 8 feet (2.2 to 2.5 m) from head to rump. Their tail adds another 3 to 5 inches (7.5 to 12.5 centimeters). An adult male polar bear weighs around 775 to 1,200 lbs. (351 to 544 kilograms).