How large is a giraffe in comparison to a human?

Huge

A male Giraffe is 15 to 18 feet tall regularly, which is equal to 4.5 to 5.5 metres. Roughly 3 times taller than a human.

They can weigh from 2000 to 4000 pounds; which is from 900 to 1800 kilo

A record holding giant giraffe stood 20 feet tall and weight 4500 lb; That is 6.09 metres and 2042 kg.