Grizzly bears are large and powerful animals with size varying by region and sex. Size and Weight:

• Males typically weigh between 400 to 858 pounds (181 to 389 kg), with some coastal Alaskan males reaching up to 816 kg (about 1,800 lb) or more in exceptional cases. Females are smaller, usually weighing between 207 to 456 pounds (95 to 207 kg), though some sources note females can weigh 250 to 350 pounds (110 to 160 kg) in the contiguous U.S.

• In northern interior Canada, grizzlies tend to be smaller, with males around 306 pounds (139 kg) and females about 209 pounds (95 kg), similar to black bears in that area.

• Some grizzlies can reach weights over 1,300 pounds (590 kg), especially large males.

Length and Height:

• Their total body length ranges from about 5.5 to 8 feet (1.68 to 2.44 meters).

• Shoulder height averages around 3.3 to 4 feet (1 to 1.2 meters), with standing height reaching up to 8 to 9.75 feet (2.5 to 3 meters) when upright.

Additional Characteristics:

• Grizzlies have a distinctive muscular hump on their shoulders and long front claws (2 to 4 inches) used for digging.

• Their fur color varies from blond to nearly black, often with white or blond tips giving a "grizzled" appearance.

In summary, grizzly bears are among the largest brown bears, with adult males commonly weighing between 400 and 800 pounds and measuring up to 8 feet long, while females are smaller but still sizable. Their size varies significantly depending on geographic location and food availability.