Anywhere from 3 to 15 meters tall, usually. They're obviously a lot stronger than us, and the bastards have the nerve to regenerate when they're injured. The only way to finish one off is to slice open the back of its neck.

[An impatient sigh, as he anticipates what this guy's next question might be.] We've developed a weapon - 3D maneuver gear - that lets us do this. It uses a system of steel cables to let you gain height and cross huge distances through the air, and you're propelled by gas. You're equipped with steel blades, too.