blockheads are exactly 2.65 torque units tall. studs are 0.5 torque units long.
assuming blockheads are 5 feet tall, that means one stud is 0.9434 feet.
if you assume they are 6 feet tall, then one stud is 1.1321 feet.
if you want 1 stud to be one foot, blockheads are 5.3 feet tall.