Minox was moderately famous for making a tiny spy camera using 16mm film. But they also made the smallest 35mm camera in the world (100 x 61 x 31mm or just 2.4″ tall), and I owned several as each broke or Minox made small improvements.
The original flash wasn’t too bad, but it ate through batteries. The second-generation flash took four at a time and is bigger than the camera! So to carry the pair with me I used a purse (!). LEDs are an incredible breakthrough in so many ways.