Gorillas vary in height depending on their species and sex, but generally:

• Adult male silverback gorillas stand about 1.7 to 1.8 meters tall (5.6 to 5.9 feet) when standing upright

. Some sources note they can reach up to 2 meters (about 6.6 feet)

• Western gorillas average around 1.4 meters tall (about 4.6 feet).
• Eastern lowland gorillas (Grauer's gorillas) are among the tallest subspecies, reaching about 1.75 meters (5.7 feet)

• Mountain gorillas can stand around 1.5 meters tall (about 5 feet) on all fours but can reach over 6 feet when standing upright

In summary, fully grown adult male gorillas typically range from about 1.4 meters to 2 meters tall when standing upright, with silverbacks often around 1.7 to 1.8 meters tall, and some individuals reaching heights comparable to or exceeding 6 feet

. Female gorillas are generally smaller. Their height is often underestimated because gorillas usually move on all fours using knuckle-walking, but they can stand and walk bipedally for short distances