dont have pics of mine, but it resembles this one.
4 pcs of ccf, each in their own nylon pocket stitched togeterh. I have no idea of the dimesions, I sized it go fit my rear very generously and also fit my rear conservatively when folded in half. Maybe 16"x16" or so.
I put it between the layers on my DIY DBL 1.1. It seems to stay there. Originally, I was using a solid piece of ccf an had a piece of shock cord on it so if it jumped out of the hammck, I could use my foot on the RL to pull it back. It did this frequently. The new foliding version seems to stay in place MUCH better between the layers.
It does make a sit good sit pad/ kneel pad and if I go to a full UQ at some point, I likely will still carry this for a sit pad. It takes lots of space, but very little weight and it's worth carrying.