I picked these up as a random find at Salute a year or two ago, and they've sat in my WIP box for a while. They're pretty darned small, and a nice exercise in painting accurately. I didn't make a note of who makes them - but if you recognise them, please let me know so I can update this post.
Size comparison with a PrimarisWhile I wouldn't make an army of these any time soon, it was a fun exercise to try and apply better colour usage at a tiny scale, and also to test out my new brushes!