This is a quick 'n dirty knitting pattern: the Duffers AKA the 19-Row Felted Slippers, designed by Mindie Tallack:
These were finished in one evening of easy knitting. I chucked them in the laundry hamper with the intention of felting them with a load of jeans. That took a while, since they were in the bottom of the hamper with Eric's wool work socks, which I let accumulate until there's a decent (albeit small) load's worth. Finally, I zipped them in a laundry bag (to mitigate the loose fluff they create in the washer), threw them in the wash and forgot to check them during the wash cycle. Thankfully, they felted perfectly, and fit me to a T.
I'll be making more, that's for sure.