When I put on my phone with the light in the back I could see little tiny spikes but too small to count(I don’t have a magnifying glass or I may have been able to) and there was no way to tell of if short and blunt or long and pointy. I guess I would say short as they were barely visible but short is a relative word without something to compare it to. (I think there’s a joke in there somewhere but I’m not going there)