Can't imagine how something like this would come from worm but surely reminds on it.
Forest, Slovenia. Original length before photo taking - x 2.
img: http://agrozoo.ne...29dec796f0
Rather 'fat' one. I get to 2.7 mm at 'fattest round' image I have --> http://agrozoo.ne...0efad373a1
One could also say it mybe shrinks a bit at dying and drying.