Trap and "Acquaintances"

Tony Stark, for one, could easily see through this sort of low-level disguise with a simple command to his AI program.

After all, the external appearance could be altered slightly, but there was no way to adjust the joints.

Even if a height difference of 10 cm could be closed with taller shoes, the way strength was exerted wasn't the same.

By the same logic, individuals with a 5-cm difference in arm length would adopt different combat methods.

Things like body proportions and center of gravity could also affect the body.

That was also why Luke had always liked to make bigger sets of battle armor — armor that was more than 5 cm thick completely hid these sorts of things.

It was impossible to tell from the outside whether the user was 1.6 meters or 1.8 meters tall in a suit of armor that was 2 meters tall.