>>48478
I guess battletech has that covered too since a thing called Protomechs exists. I guess it's still a mech since its a vehicle that is piloted by a person rather than an armor that he is wearing. It fills that size niche in between the smallest "normal" mechs and the battle armor. This is also where the skinny dudes are put in (the faction that produces them has a eugenics program going on and a caste system based on it). Protomechs can't really survive under heavy fire so they rely on their small size and speed for survival.