title_body: What is the smallest drone ever made? There are nanocars and nanomachines in general. 
  
  I would be very impressed if a nano drone or nano-UAV existed, however, I would not be surprised if there has been something built on the microscopic scale.
  
  What is the world record for the smallest drone ever made?
upvoted_answer: Previous answers have covered commercial ones. I believe the smallest self-powered drone is the piccolissimo. It is 2.5g and passively stable.
  
  Here is the Wikipedia article on it:
  https://en.m.wikipedia.org/wiki/Piccolissimo