Miruphobia

It's the fear of little humans or people of average size but with very little body parts (in particular hands).
It can also be fear of itself being of very small size, almost microscopic.

Very few people are affected by it so it's still understudy, it's believed that it was born by a dream but we still don't know what happened in it.

I have a very normal phobia, I'm afraid of little humans
That's Miruphobia!