The information in this article is from the fan game s and is therefore not canon.
Background
According to King's Quest ZZT games; Humans are about +/- 6 feet tall. Humans are the most common race in the world of King's Quest. They have built settlements almost everywhere and have proven to be able to survive in any climate, from cold icelands to hot deserts. Some humans like soldiers, are powerful fighters, but others like Clerics and Warlocks are trained in magic.