I see lots of crochet slippers over on Ravalry. You could cut a sole out of felt and stitch it over the sole. Or were you thinking of something else, maybe a pattern that incorporated the felted sole into the crocheted upper?
The Following User Says Thank You to salmonmac For This Useful Post:
Closest thing I've seen was a pattern for felted bunny slippers that was in an email I got from... probably Paradise Fibers or Yarn.com (I can't remember and I deleted it already.) Complete with faces (and ears). I think it was knit though.
The Following User Says Thank You to mojo11 For This Useful Post: