Here, I have crochet
Here is the crochet piece before felting. I mixed Schoeller Nm 10/3 conductive yarn with hippy rainbow color felting yarn.
Now it is time to
It shrinks quite a bit after felting. In the picture on the left, bottom piece was same size as the top piece before felting. After felting, it definitely got smaller. If you are making a project that requires exact size, you should consider the shrinkage when you knit. The texture of the piece also changes a lot. It gets much thicker and firmer.