A full-grown moose can weigh 800–1,400 pounds and stand 5.5–6.5 feet tall at the shoulder. An elk typically weighs 500–700 pounds and stands 4–5 feet tall. A white-tailed deer weighs 100–300 pounds and stands 2.5–3.5 feet tall at the shoulder. Moose are the biggest of the three, followed by elk, then deer. A bull moose ...