I made a trivit. I agree, it's kinda ugly & I mostly did it to see if I could.
I used some Lamb's Pride bulky from stash on ... oh, I can't remember the needle side, except that they were too small. I think they were about #9s. They should have been bigger. I think that would have helped with the felting.

I cast on 30 stitches & knit it like a cat basket, then threw it in the washing machine with the laundry for 3 tries. This is the result.