For size I could only say, I believe it is a smallish Lygus bug being eaten. So, big. Probably 2mm at least. What got my attention was a size large enough to see, a position that was pretty stationary (because it is about to eat), and I was curious about the victim being on its back, and having hair coiled around it. This is probably just a coincidence but I saw a dead ladybug larva not long ago with what looked like a couple of coils of hair around it. It made me wonder if some bug predator uses some sort of "rope" to trip them with. Probably not, but it just made me wonder. Mites like this typically run down their prey...but they can't fly!