Someone left a comment somewhere on here that I can't find. Google told me there was an error when I approved it for publishing, so maybe it just ate the thing.
Anyway, if it was you asking about the size of the Signature thread -- this is my answer. It's a very fine thread, because it is a machine embroidery thread. It's about the same thickness as regular sewing thread. It's trilobal polyester. I have no idea what that means, but it seems to be less inclined to fuzz than polyester covered cotton sewing thread. It does tend to stretch when trying to close rings (well, it does if you tat as tightly as I do). I buy it at a local shop. I don't know if it is available somewhere on line; I've never looked. Here's a picture of the thread labels:
Sunset over Lake Dora - In Martu Lands, Great Sandy Desert
9 hours ago